diff --git a/CHANGELOG.md b/CHANGELOG.md
index 35e4c63ef..10b3a72f0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ### Added
 
+- Added the command palette https://github.com/Textualize/textual/pull/3058
 - `Input` is now validated when focus moves out of it https://github.com/Textualize/textual/pull/3193
 - Attribute `Input.validate_on` (and `__init__` parameter of the same name) to customise when validation occurs https://github.com/Textualize/textual/pull/3193
 - Screen-specific (sub-)title attributes https://github.com/Textualize/textual/pull/3199:
@@ -28,6 +29,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - Breaking change: Widget.notify and App.notify now return None https://github.com/Textualize/textual/pull/3275
 - App.unnotify is now private (renamed to App._unnotify) https://github.com/Textualize/textual/pull/3275
 
+
 ## [0.36.0] - 2023-09-05
 
 ### Added
diff --git a/docs/api/command_palette.md b/docs/api/command_palette.md
new file mode 100644
index 000000000..c7aea72eb
--- /dev/null
+++ b/docs/api/command_palette.md
@@ -0,0 +1,135 @@
+!!! tip "Added in version 0.37.0"
+
+## Introduction
+
+The command palette provides a system-wide facility for searching for and
+executing commands. These commands are added by creating command source
+classes and declaring them on your [application](../../guide/app/) or your
+[screens](../../guide/screens/).
+
+Note that `CommandPalette` itself isn't designed to be used directly in your
+applications; it is instead something that is enabled by default and is made
+available by the Textual [`App`][textual.app.App] class. If you wish to
+disable the availability of the command palette you can set the
+[`use_command_palette`][textual.app.App.use_command_palette] switch to
+`False`.
+
+## Creating a command source
+
+To add your own command source to the Textual command palette you start by
+creating a class that inherits from
+[`CommandSource`][textual.command_palette.CommandSource]. Your new command
+source class should implement the
+[`search`][textual.command_palette.CommandSource.search] method. This
+should be an `async` method which `yield`s instances of
+[`CommandSourceHit`][textual.command_palette.CommandSourceHit].
+
+For example, suppose we wanted to create a command source that would look
+through the globals in a running application and use
+[`notify`][textual.app.App.notify] to show the docstring (admittedly not the
+most useful command source, but illustrative of a source of text to match
+and code to run).
+
+The command source might look something like this:
+
+```python
+from functools import partial
+
+# ...
+
+class PythonGlobalSource(CommandSource):
+    """A command palette source for globals in an app."""
+
+    async def search(self, query: str) -> CommandMatches:
+        # Create a fuzzy matching object for the query.
+        matcher = self.matcher(query)
+        # Looping throught the available globals...
+        for name, value in globals().items():
+            # Get a match score for the name.
+            match = matcher.match(name)
+            # If the match is above 0...
+            if match:
+                # ...pass the command up to the palette.
+                yield CommandSourceHit(
+                    # The match score.
+                    match,
+                    # A highlighted version of the matched item,
+                    # showing how and where it matched.
+                    matcher.highlight(name),
+                    # The code to run. Here we'll call the Textual
+                    # notification system and get it to show the
+                    # docstring for the chosen item, if there is
+                    # one.
+                    partial(
+                        self.app.notify,
+                        value.__doc__ or "[i]Undocumented[/i]",
+                        title=name
+                    ),
+                    # The plain text that was selected.
+                    name
+                )
+```
+
+!!! important
+
+    The command palette populates itself asynchronously, pulling matches from
+    all of the active sources. Your command source `search` method must be
+    `async`, and must not block in any way; doing so will affect the
+    performance of the user's experience while using the command palette.
+
+The key point here is that the `search` method should look for matches,
+given the user input, and yield up a
+[`CommandSourceHit`][textual.command_palette.CommandSourceHit], which will
+contain the match score (which should be between 0 and 1), a Rich renderable
+(such as a [rich Text object][rich.text.Text]) to illustrate how the command
+was matched (this appears in the drop-down list of the command palette), a
+reference to a function to run when the user selects that command, and the
+plain text version of the command.
+
+## Unhandled exceptions in a command source
+
+When writing your command source `search` method you should attempt to
+handle all possible errors. In the event that there is an unhandled
+exception Textual will carry on working and carry on taking results from any
+other registered command sources.
+
+!!! important
+
+    This is different from how Textual normally works. Under normal
+    circumstances Textual would not "hide" your errors.
+
+Textual doesn't just throw the exception away though. If an exception isn't
+handled by your code it will be logged to [the Textual devtools
+console](../../guide/devtools#console).
+
+## Using a command source
+
+Once a command source has been created it can be used either on an `App` or
+a `Screen`; this is done with the [`COMMAND_SOURCES` class variable][textual.app.App.COMMAND_SOURCES]. One or more command sources can
+be given. For example:
+
+```python
+class MyApp(App[None]):
+
+    COMMAND_SOURCES = {MyCommandSource, MyOtherCommandSource}
+```
+
+When the command palette is called by the user, those sources will be used
+to populate the list of search hits.
+
+!!! tip
+
+    If you wish to use your own commands sources on your appliaction, and
+    you wish to keep using the default Textual command sources, be sure to
+    include the ones provided by [`App`][textual.app.App.COMMAND_SOURCES].
+    For example:
+
+    ```python
+    class MyApp(App[None]):
+
+        COMMAND_SOURCES = App.COMMAND_SOURCES | {MyCommandSource, MyOtherCommandSource}
+    ```
+
+## API documentation
+
+::: textual.command_palette
diff --git a/docs/api/fuzzy_matcher.md b/docs/api/fuzzy_matcher.md
new file mode 100644
index 000000000..015e71351
--- /dev/null
+++ b/docs/api/fuzzy_matcher.md
@@ -0,0 +1 @@
+::: textual._fuzzy
diff --git a/docs/api/system_commands_source.md b/docs/api/system_commands_source.md
new file mode 100644
index 000000000..00fe759f5
--- /dev/null
+++ b/docs/api/system_commands_source.md
@@ -0,0 +1 @@
+::: textual._system_commands_source
diff --git a/examples/code_browser.py b/examples/code_browser.py
index c613847e5..f3d482d5e 100644
--- a/examples/code_browser.py
+++ b/examples/code_browser.py
@@ -11,7 +11,6 @@ import sys
 from rich.syntax import Syntax
 from rich.traceback import Traceback
 
-from textual import events
 from textual.app import App, ComposeResult
 from textual.containers import Container, VerticalScroll
 from textual.reactive import var
@@ -43,7 +42,7 @@ class CodeBrowser(App):
                 yield Static(id="code", expand=True)
         yield Footer()
 
-    def on_mount(self, event: events.Mount) -> None:
+    def on_mount(self) -> None:
         self.query_one(DirectoryTree).focus()
 
     def on_directory_tree_file_selected(
diff --git a/mkdocs-nav.yml b/mkdocs-nav.yml
index 957765fbb..9833e9ffa 100644
--- a/mkdocs-nav.yml
+++ b/mkdocs-nav.yml
@@ -168,12 +168,14 @@ nav:
               - "api/await_remove.md"
               - "api/binding.md"
               - "api/color.md"
+              - "api/command_palette.md"
               - "api/containers.md"
               - "api/coordinate.md"
               - "api/dom_node.md"
               - "api/events.md"
               - "api/errors.md"
               - "api/filter.md"
+              - "api/fuzzy_matcher.md"
               - "api/geometry.md"
               - "api/logger.md"
               - "api/logging.md"
@@ -189,6 +191,7 @@ nav:
               - "api/scroll_view.md"
               - "api/strip.md"
               - "api/suggester.md"
+              - "api/system_commands_source.md"
               - "api/timer.md"
               - "api/types.md"
               - "api/validation.md"
diff --git a/poetry.lock b/poetry.lock
index 54e4dfca0..85f077943 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,10 +1,9 @@
-# This file is automatically @generated by Poetry 1.4.0 and should not be changed by hand.
+# This file is automatically @generated by Poetry 1.6.1 and should not be changed by hand.
 
 [[package]]
 name = "aiohttp"
 version = "3.8.5"
 description = "Async http client/server framework (asyncio)"
-category = "dev"
 optional = false
 python-versions = ">=3.6"
 files = [
@@ -115,7 +114,6 @@ speedups = ["Brotli", "aiodns", "cchardet"]
 name = "aiosignal"
 version = "1.3.1"
 description = "aiosignal: a list of registered asynchronous callbacks"
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -130,7 +128,6 @@ frozenlist = ">=1.1.0"
 name = "anyio"
 version = "3.7.1"
 description = "High level compatibility layer for multiple asynchronous event loop implementations"
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -153,7 +150,6 @@ trio = ["trio (<0.22)"]
 name = "async-timeout"
 version = "4.0.3"
 description = "Timeout context manager for asyncio programs"
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -168,7 +164,6 @@ typing-extensions = {version = ">=3.6.5", markers = "python_version < \"3.8\""}
 name = "asynctest"
 version = "0.13.0"
 description = "Enhance the standard unittest package with features for testing asyncio libraries"
-category = "dev"
 optional = false
 python-versions = ">=3.5"
 files = [
@@ -180,7 +175,6 @@ files = [
 name = "attrs"
 version = "23.1.0"
 description = "Classes Without Boilerplate"
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -202,7 +196,6 @@ tests-no-zope = ["cloudpickle", "hypothesis", "mypy (>=1.1.1)", "pympler", "pyte
 name = "babel"
 version = "2.12.1"
 description = "Internationalization utilities"
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -213,30 +206,10 @@ files = [
 [package.dependencies]
 pytz = {version = ">=2015.7", markers = "python_version < \"3.9\""}
 
-[[package]]
-name = "beautifulsoup4"
-version = "4.12.2"
-description = "Screen-scraping library"
-category = "dev"
-optional = false
-python-versions = ">=3.6.0"
-files = [
-    {file = "beautifulsoup4-4.12.2-py3-none-any.whl", hash = "sha256:bd2520ca0d9d7d12694a53d44ac482d181b4ec1888909b035a3dbf40d0f57d4a"},
-    {file = "beautifulsoup4-4.12.2.tar.gz", hash = "sha256:492bbc69dca35d12daac71c4db1bfff0c876c00ef4a2ffacce226d4638eb72da"},
-]
-
-[package.dependencies]
-soupsieve = ">1.2"
-
-[package.extras]
-html5lib = ["html5lib"]
-lxml = ["lxml"]
-
 [[package]]
 name = "black"
 version = "23.3.0"
 description = "The uncompromising code formatter."
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -287,7 +260,6 @@ uvloop = ["uvloop (>=0.15.2)"]
 name = "cached-property"
 version = "1.5.2"
 description = "A decorator for caching properties in classes."
-category = "dev"
 optional = false
 python-versions = "*"
 files = [
@@ -299,7 +271,6 @@ files = [
 name = "certifi"
 version = "2023.7.22"
 description = "Python package for providing Mozilla's CA Bundle."
-category = "dev"
 optional = false
 python-versions = ">=3.6"
 files = [
@@ -311,7 +282,6 @@ files = [
 name = "cfgv"
 version = "3.3.1"
 description = "Validate configuration and produce human readable error messages."
-category = "dev"
 optional = false
 python-versions = ">=3.6.1"
 files = [
@@ -323,7 +293,6 @@ files = [
 name = "charset-normalizer"
 version = "3.2.0"
 description = "The Real First Universal Charset Detector. Open, modern and actively maintained alternative to Chardet."
-category = "dev"
 optional = false
 python-versions = ">=3.7.0"
 files = [
@@ -408,7 +377,6 @@ files = [
 name = "click"
 version = "8.1.7"
 description = "Composable command line interface toolkit"
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -424,7 +392,6 @@ importlib-metadata = {version = "*", markers = "python_version < \"3.8\""}
 name = "colorama"
 version = "0.4.6"
 description = "Cross-platform colored terminal text."
-category = "dev"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*,!=3.6.*,>=2.7"
 files = [
@@ -436,7 +403,6 @@ files = [
 name = "colored"
 version = "1.4.4"
 description = "Simple library for color and formatting to terminal"
-category = "dev"
 optional = false
 python-versions = "*"
 files = [
@@ -447,7 +413,6 @@ files = [
 name = "coverage"
 version = "7.2.7"
 description = "Code coverage measurement for Python"
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -516,23 +481,10 @@ files = [
 [package.extras]
 toml = ["tomli"]
 
-[[package]]
-name = "cssselect"
-version = "1.2.0"
-description = "cssselect parses CSS3 Selectors and translates them to XPath 1.0"
-category = "dev"
-optional = false
-python-versions = ">=3.7"
-files = [
-    {file = "cssselect-1.2.0-py2.py3-none-any.whl", hash = "sha256:da1885f0c10b60c03ed5eccbb6b68d6eff248d91976fcde348f395d54c9fd35e"},
-    {file = "cssselect-1.2.0.tar.gz", hash = "sha256:666b19839cfaddb9ce9d36bfe4c969132c647b92fc9088c4e23f786b30f1b3dc"},
-]
-
 [[package]]
 name = "distlib"
 version = "0.3.7"
 description = "Distribution utilities"
-category = "dev"
 optional = false
 python-versions = "*"
 files = [
@@ -544,7 +496,6 @@ files = [
 name = "exceptiongroup"
 version = "1.1.3"
 description = "Backport of PEP 654 (exception groups)"
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -559,7 +510,6 @@ test = ["pytest (>=6)"]
 name = "filelock"
 version = "3.12.2"
 description = "A platform independent file lock."
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -575,7 +525,6 @@ testing = ["covdefaults (>=2.3)", "coverage (>=7.2.7)", "diff-cover (>=7.5)", "p
 name = "frozenlist"
 version = "1.3.3"
 description = "A list-like structure which implements collections.abc.MutableSequence"
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -659,7 +608,6 @@ files = [
 name = "ghp-import"
 version = "2.1.0"
 description = "Copy your docs directly to the gh-pages branch."
-category = "dev"
 optional = false
 python-versions = "*"
 files = [
@@ -677,7 +625,6 @@ dev = ["flake8", "markdown", "twine", "wheel"]
 name = "gitdb"
 version = "4.0.10"
 description = "Git Object Database"
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -690,14 +637,13 @@ smmap = ">=3.0.1,<6"
 
 [[package]]
 name = "gitpython"
-version = "3.1.33"
+version = "3.1.34"
 description = "GitPython is a Python library used to interact with Git repositories"
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
-    {file = "GitPython-3.1.33-py3-none-any.whl", hash = "sha256:11f22466f982211ad8f3bdb456c03be8466c71d4da8774f3a9f68344e89559cb"},
-    {file = "GitPython-3.1.33.tar.gz", hash = "sha256:13aaa3dff88a23afec2d00eb3da3f2e040e2282e41de484c5791669b31146084"},
+    {file = "GitPython-3.1.34-py3-none-any.whl", hash = "sha256:5d3802b98a3bae1c2b8ae0e1ff2e4aa16bcdf02c145da34d092324f599f01395"},
+    {file = "GitPython-3.1.34.tar.gz", hash = "sha256:85f7d365d1f6bf677ae51039c1ef67ca59091c7ebd5a3509aa399d4eda02d6dd"},
 ]
 
 [package.dependencies]
@@ -708,7 +654,6 @@ typing-extensions = {version = ">=3.7.4.3", markers = "python_version < \"3.8\""
 name = "griffe"
 version = "0.30.1"
 description = "Signatures for entire Python programs. Extract the structure, the frame, the skeleton of your project, to generate API documentation or find breaking changes in your API."
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -724,7 +669,6 @@ colorama = ">=0.4"
 name = "h11"
 version = "0.14.0"
 description = "A pure-Python, bring-your-own-I/O implementation of HTTP/1.1"
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -739,7 +683,6 @@ typing-extensions = {version = "*", markers = "python_version < \"3.8\""}
 name = "httpcore"
 version = "0.16.3"
 description = "A minimal low-level HTTP client."
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -751,17 +694,16 @@ files = [
 anyio = ">=3.0,<5.0"
 certifi = "*"
 h11 = ">=0.13,<0.15"
-sniffio = ">=1.0.0,<2.0.0"
+sniffio = "==1.*"
 
 [package.extras]
 http2 = ["h2 (>=3,<5)"]
-socks = ["socksio (>=1.0.0,<2.0.0)"]
+socks = ["socksio (==1.*)"]
 
 [[package]]
 name = "httpx"
 version = "0.23.3"
 description = "The next generation HTTP client."
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -777,15 +719,14 @@ sniffio = "*"
 
 [package.extras]
 brotli = ["brotli", "brotlicffi"]
-cli = ["click (>=8.0.0,<9.0.0)", "pygments (>=2.0.0,<3.0.0)", "rich (>=10,<13)"]
+cli = ["click (==8.*)", "pygments (==2.*)", "rich (>=10,<13)"]
 http2 = ["h2 (>=3,<5)"]
-socks = ["socksio (>=1.0.0,<2.0.0)"]
+socks = ["socksio (==1.*)"]
 
 [[package]]
 name = "identify"
 version = "2.5.24"
 description = "File identification library for Python"
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -800,7 +741,6 @@ license = ["ukkonen"]
 name = "idna"
 version = "3.4"
 description = "Internationalized Domain Names in Applications (IDNA)"
-category = "dev"
 optional = false
 python-versions = ">=3.5"
 files = [
@@ -812,7 +752,6 @@ files = [
 name = "importlib-metadata"
 version = "6.7.0"
 description = "Read metadata from Python packages"
-category = "main"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -833,7 +772,6 @@ testing = ["flufl.flake8", "importlib-resources (>=1.3)", "packaging", "pyfakefs
 name = "iniconfig"
 version = "2.0.0"
 description = "brain-dead simple config-ini parsing"
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -845,7 +783,6 @@ files = [
 name = "jinja2"
 version = "3.1.2"
 description = "A very fast and expressive template engine."
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -863,7 +800,6 @@ i18n = ["Babel (>=2.7)"]
 name = "linkify-it-py"
 version = "2.0.2"
 description = "Links recognition library with FULL unicode support."
-category = "main"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -880,119 +816,10 @@ dev = ["black", "flake8", "isort", "pre-commit", "pyproject-flake8"]
 doc = ["myst-parser", "sphinx", "sphinx-book-theme"]
 test = ["coverage", "pytest", "pytest-cov"]
 
-[[package]]
-name = "lxml"
-version = "4.9.3"
-description = "Powerful and Pythonic XML processing library combining libxml2/libxslt with the ElementTree API."
-category = "dev"
-optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, != 3.4.*"
-files = [
-    {file = "lxml-4.9.3-cp27-cp27m-macosx_11_0_x86_64.whl", hash = "sha256:b0a545b46b526d418eb91754565ba5b63b1c0b12f9bd2f808c852d9b4b2f9b5c"},
-    {file = "lxml-4.9.3-cp27-cp27m-manylinux_2_5_i686.manylinux1_i686.whl", hash = "sha256:075b731ddd9e7f68ad24c635374211376aa05a281673ede86cbe1d1b3455279d"},
-    {file = "lxml-4.9.3-cp27-cp27m-manylinux_2_5_x86_64.manylinux1_x86_64.whl", hash = "sha256:1e224d5755dba2f4a9498e150c43792392ac9b5380aa1b845f98a1618c94eeef"},
-    {file = "lxml-4.9.3-cp27-cp27m-win32.whl", hash = "sha256:2c74524e179f2ad6d2a4f7caf70e2d96639c0954c943ad601a9e146c76408ed7"},
-    {file = "lxml-4.9.3-cp27-cp27m-win_amd64.whl", hash = "sha256:4f1026bc732b6a7f96369f7bfe1a4f2290fb34dce00d8644bc3036fb351a4ca1"},
-    {file = "lxml-4.9.3-cp27-cp27mu-manylinux_2_5_i686.manylinux1_i686.whl", hash = "sha256:c0781a98ff5e6586926293e59480b64ddd46282953203c76ae15dbbbf302e8bb"},
-    {file = "lxml-4.9.3-cp27-cp27mu-manylinux_2_5_x86_64.manylinux1_x86_64.whl", hash = "sha256:cef2502e7e8a96fe5ad686d60b49e1ab03e438bd9123987994528febd569868e"},
-    {file = "lxml-4.9.3-cp310-cp310-macosx_11_0_x86_64.whl", hash = "sha256:b86164d2cff4d3aaa1f04a14685cbc072efd0b4f99ca5708b2ad1b9b5988a991"},
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@@ -1116,7 +924,6 @@ files = [
 name = "mdit-py-plugins"
 version = "0.3.5"
 description = "Collection of plugins for markdown-it-py"
-category = "main"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -1136,7 +943,6 @@ testing = ["coverage", "pytest", "pytest-cov", "pytest-regressions"]
 name = "mdurl"
 version = "0.1.2"
 description = "Markdown URL utilities"
-category = "main"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -1148,7 +954,6 @@ files = [
 name = "mergedeep"
 version = "1.3.4"
 description = "A deep merge function for 🐍."
-category = "dev"
 optional = false
 python-versions = ">=3.6"
 files = [
@@ -1160,7 +965,6 @@ files = [
 name = "mkdocs"
 version = "1.5.2"
 description = "Project documentation with Markdown."
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -1193,7 +997,6 @@ min-versions = ["babel (==2.9.0)", "click (==7.0)", "colorama (==0.4)", "ghp-imp
 name = "mkdocs-autorefs"
 version = "0.4.1"
 description = "Automatically link across pages in MkDocs."
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -1209,7 +1012,6 @@ mkdocs = ">=1.1"
 name = "mkdocs-exclude"
 version = "1.0.2"
 description = "A mkdocs plugin that lets you exclude files or trees."
-category = "dev"
 optional = false
 python-versions = "*"
 files = [
@@ -1221,36 +1023,32 @@ mkdocs = "*"
 
 [[package]]
 name = "mkdocs-material"
-version = "9.2.6"
+version = "9.2.7"
 description = "Documentation that simply works"
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
-    {file = "mkdocs_material-9.2.6-py3-none-any.whl", hash = "sha256:84bc7e79c1d0bae65a77123efd5ef74731b8c3671601c7962c5db8dba50a65ad"},
-    {file = "mkdocs_material-9.2.6.tar.gz", hash = "sha256:3806c58dd112e7b9677225e2021035ddbe3220fbd29d9dc812aa7e01f70b5e0a"},
+    {file = "mkdocs_material-9.2.7-py3-none-any.whl", hash = "sha256:92e4160d191cc76121fed14ab9f14638e43a6da0f2e9d7a9194d377f0a4e7f18"},
+    {file = "mkdocs_material-9.2.7.tar.gz", hash = "sha256:b44da35b0d98cd762d09ef74f1ddce5b6d6e35c13f13beb0c9d82a629e5f229e"},
 ]
 
 [package.dependencies]
-babel = ">=2.10.3"
-colorama = ">=0.4"
-jinja2 = ">=3.0"
-lxml = ">=4.6"
-markdown = ">=3.2"
-mkdocs = ">=1.5.2"
-mkdocs-material-extensions = ">=1.1"
-paginate = ">=0.5.6"
-pygments = ">=2.14"
-pymdown-extensions = ">=9.9.1"
-readtime = ">=2.0"
-regex = ">=2022.4.24"
-requests = ">=2.26"
+babel = ">=2.10,<3.0"
+colorama = ">=0.4,<1.0"
+jinja2 = ">=3.0,<4.0"
+markdown = ">=3.2,<4.0"
+mkdocs = ">=1.5,<2.0"
+mkdocs-material-extensions = ">=1.1,<2.0"
+paginate = ">=0.5,<1.0"
+pygments = ">=2.16,<3.0"
+pymdown-extensions = ">=10.2,<11.0"
+regex = ">=2022.4,<2023.0"
+requests = ">=2.26,<3.0"
 
 [[package]]
 name = "mkdocs-material-extensions"
 version = "1.1.1"
 description = "Extension pack for Python Markdown and MkDocs Material."
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -1262,7 +1060,6 @@ files = [
 name = "mkdocs-rss-plugin"
 version = "1.5.0"
 description = "MkDocs plugin which generates a static RSS feed using git log and page.meta."
-category = "dev"
 optional = false
 python-versions = ">=3.7, <4"
 files = [
@@ -1273,18 +1070,17 @@ files = [
 [package.dependencies]
 GitPython = ">=3.1,<3.2"
 mkdocs = ">=1.1,<2"
-pytz = {version = ">=2022.0.0,<2023.0.0", markers = "python_version < \"3.9\""}
-tzdata = {version = ">=2022.0.0,<2023.0.0", markers = "python_version >= \"3.9\" and sys_platform == \"win32\""}
+pytz = {version = "==2022.*", markers = "python_version < \"3.9\""}
+tzdata = {version = "==2022.*", markers = "python_version >= \"3.9\" and sys_platform == \"win32\""}
 
 [package.extras]
-dev = ["black", "feedparser (>=6.0,<6.1)", "flake8 (>=4,<5.1)", "pre-commit (>=2.10,<2.21)", "pytest-cov (>=4.0.0,<4.1.0)", "validator-collection (>=1.5,<1.6)"]
-doc = ["mkdocs-bootswatch (>=1,<2)", "mkdocs-minify-plugin (>=0.5.0,<0.6.0)", "pygments (>=2.5,<3)", "pymdown-extensions (>=7,<10)"]
+dev = ["black", "feedparser (>=6.0,<6.1)", "flake8 (>=4,<5.1)", "pre-commit (>=2.10,<2.21)", "pytest-cov (==4.0.*)", "validator-collection (>=1.5,<1.6)"]
+doc = ["mkdocs-bootswatch (>=1,<2)", "mkdocs-minify-plugin (==0.5.*)", "pygments (>=2.5,<3)", "pymdown-extensions (>=7,<10)"]
 
 [[package]]
 name = "mkdocstrings"
 version = "0.20.0"
 description = "Automatic documentation from sources, for MkDocs."
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -1310,7 +1106,6 @@ python-legacy = ["mkdocstrings-python-legacy (>=0.2.1)"]
 name = "mkdocstrings-python"
 version = "0.10.1"
 description = "A Python handler for mkdocstrings."
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -1326,7 +1121,6 @@ mkdocstrings = ">=0.20"
 name = "msgpack"
 version = "1.0.5"
 description = "MessagePack serializer"
-category = "dev"
 optional = false
 python-versions = "*"
 files = [
@@ -1399,7 +1193,6 @@ files = [
 name = "multidict"
 version = "6.0.4"
 description = "multidict implementation"
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -1483,7 +1276,6 @@ files = [
 name = "mypy"
 version = "1.4.1"
 description = "Optional static typing for Python"
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -1531,7 +1323,6 @@ reports = ["lxml"]
 name = "mypy-extensions"
 version = "1.0.0"
 description = "Type system extensions for programs checked with the mypy type checker."
-category = "dev"
 optional = false
 python-versions = ">=3.5"
 files = [
@@ -1543,7 +1334,6 @@ files = [
 name = "nodeenv"
 version = "1.8.0"
 description = "Node.js virtual environment builder"
-category = "dev"
 optional = false
 python-versions = ">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*,!=3.6.*"
 files = [
@@ -1558,7 +1348,6 @@ setuptools = "*"
 name = "packaging"
 version = "23.1"
 description = "Core utilities for Python packages"
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -1570,7 +1359,6 @@ files = [
 name = "paginate"
 version = "0.5.6"
 description = "Divides large result sets into pages for easier browsing"
-category = "dev"
 optional = false
 python-versions = "*"
 files = [
@@ -1581,7 +1369,6 @@ files = [
 name = "pathspec"
 version = "0.11.2"
 description = "Utility library for gitignore style pattern matching of file paths."
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -1593,7 +1380,6 @@ files = [
 name = "platformdirs"
 version = "3.10.0"
 description = "A small Python package for determining appropriate platform-specific dirs, e.g. a \"user data dir\"."
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -1612,7 +1398,6 @@ test = ["appdirs (==1.4.4)", "covdefaults (>=2.3)", "pytest (>=7.4)", "pytest-co
 name = "pluggy"
 version = "1.2.0"
 description = "plugin and hook calling mechanisms for python"
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -1631,7 +1416,6 @@ testing = ["pytest", "pytest-benchmark"]
 name = "pre-commit"
 version = "2.21.0"
 description = "A framework for managing and maintaining multi-language pre-commit hooks."
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -1651,7 +1435,6 @@ virtualenv = ">=20.10.0"
 name = "pygments"
 version = "2.16.1"
 description = "Pygments is a syntax highlighting package written in Python."
-category = "main"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -1666,7 +1449,6 @@ plugins = ["importlib-metadata"]
 name = "pymdown-extensions"
 version = "10.2.1"
 description = "Extension pack for Python Markdown."
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -1681,35 +1463,15 @@ pyyaml = "*"
 [package.extras]
 extra = ["pygments (>=2.12)"]
 
-[[package]]
-name = "pyquery"
-version = "2.0.0"
-description = "A jquery-like library for python"
-category = "dev"
-optional = false
-python-versions = "*"
-files = [
-    {file = "pyquery-2.0.0-py3-none-any.whl", hash = "sha256:8dfc9b4b7c5f877d619bbae74b1898d5743f6ca248cfd5d72b504dd614da312f"},
-    {file = "pyquery-2.0.0.tar.gz", hash = "sha256:963e8d4e90262ff6d8dec072ea97285dc374a2f69cad7776f4082abcf6a1d8ae"},
-]
-
-[package.dependencies]
-cssselect = ">=1.2.0"
-lxml = ">=2.1"
-
-[package.extras]
-test = ["pytest", "pytest-cov", "requests", "webob", "webtest"]
-
 [[package]]
 name = "pytest"
-version = "7.4.0"
+version = "7.4.1"
 description = "pytest: simple powerful testing with Python"
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
-    {file = "pytest-7.4.0-py3-none-any.whl", hash = "sha256:78bf16451a2eb8c7a2ea98e32dc119fd2aa758f1d5d66dbf0a59d69a3969df32"},
-    {file = "pytest-7.4.0.tar.gz", hash = "sha256:b4bf8c45bd59934ed84001ad51e11b4ee40d40a1229d2c79f9c592b0a3f6bd8a"},
+    {file = "pytest-7.4.1-py3-none-any.whl", hash = "sha256:460c9a59b14e27c602eb5ece2e47bec99dc5fc5f6513cf924a7d03a578991b1f"},
+    {file = "pytest-7.4.1.tar.gz", hash = "sha256:2f2301e797521b23e4d2585a0a3d7b5e50fdddaaf7e7d6773ea26ddb17c213ab"},
 ]
 
 [package.dependencies]
@@ -1728,7 +1490,6 @@ testing = ["argcomplete", "attrs (>=19.2.0)", "hypothesis (>=3.56)", "mock", "no
 name = "pytest-aiohttp"
 version = "1.0.4"
 description = "Pytest plugin for aiohttp support"
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -1748,7 +1509,6 @@ testing = ["coverage (==6.2)", "mypy (==0.931)"]
 name = "pytest-asyncio"
 version = "0.21.1"
 description = "Pytest support for asyncio"
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -1768,7 +1528,6 @@ testing = ["coverage (>=6.2)", "flaky (>=3.5.0)", "hypothesis (>=5.7.1)", "mypy
 name = "pytest-cov"
 version = "2.12.1"
 description = "Pytest plugin for measuring coverage."
-category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 files = [
@@ -1786,14 +1545,13 @@ testing = ["fields", "hunter", "process-tests", "pytest-xdist", "six", "virtuale
 
 [[package]]
 name = "pytest-textual-snapshot"
-version = "0.2.0"
+version = "0.4.0"
 description = "Snapshot testing for Textual apps"
-category = "dev"
 optional = false
 python-versions = ">=3.6,<4.0"
 files = [
-    {file = "pytest_textual_snapshot-0.2.0-py3-none-any.whl", hash = "sha256:663fe07bf62181ec0c63139daaeaf50eb8088164037eb30d721f028adc9edc8c"},
-    {file = "pytest_textual_snapshot-0.2.0.tar.gz", hash = "sha256:5e9f8c4b1b011bdae67d4f1129530afd6611f3f8bcf03cf06699402179bc12cf"},
+    {file = "pytest_textual_snapshot-0.4.0-py3-none-any.whl", hash = "sha256:879cc5de29cdd31cfe1b6daeb1dc5e42682abebcf4f88e7e3375bd5200683fc0"},
+    {file = "pytest_textual_snapshot-0.4.0.tar.gz", hash = "sha256:63782e053928a925d88ff7359dd640f2900e23bc708b3007f8b388e65f2527cb"},
 ]
 
 [package.dependencies]
@@ -1807,7 +1565,6 @@ textual = ">=0.28.0"
 name = "python-dateutil"
 version = "2.8.2"
 description = "Extensions to the standard Python datetime module"
-category = "dev"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,>=2.7"
 files = [
@@ -1822,7 +1579,6 @@ six = ">=1.5"
 name = "pytz"
 version = "2022.7.1"
 description = "World timezone definitions, modern and historical"
-category = "dev"
 optional = false
 python-versions = "*"
 files = [
@@ -1834,7 +1590,6 @@ files = [
 name = "pyyaml"
 version = "6.0.1"
 description = "YAML parser and emitter for Python"
-category = "dev"
 optional = false
 python-versions = ">=3.6"
 files = [
@@ -1884,7 +1639,6 @@ files = [
 name = "pyyaml-env-tag"
 version = "0.1"
 description = "A custom YAML tag for referencing environment variables in YAML files. "
-category = "dev"
 optional = false
 python-versions = ">=3.6"
 files = [
@@ -1895,125 +1649,107 @@ files = [
 [package.dependencies]
 pyyaml = "*"
 
-[[package]]
-name = "readtime"
-version = "3.0.0"
-description = "Calculates the time some text takes the average human to read, based on Medium's read time forumula"
-category = "dev"
-optional = false
-python-versions = "*"
-files = [
-    {file = "readtime-3.0.0.tar.gz", hash = "sha256:76c5a0d773ad49858c53b42ba3a942f62fbe20cc8c6f07875797ac7dc30963a9"},
-]
-
-[package.dependencies]
-beautifulsoup4 = ">=4.0.1"
-markdown2 = ">=2.4.3"
-pyquery = ">=1.2"
-
 [[package]]
 name = "regex"
-version = "2023.8.8"
+version = "2022.10.31"
 description = "Alternative regular expression module, to replace re."
-category = "dev"
 optional = false
 python-versions = ">=3.6"
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+    {file = "regex-2022.10.31.tar.gz", hash = "sha256:a3a98921da9a1bf8457aeee6a551948a83601689e5ecdd736894ea9bbec77e83"},
 ]
 
 [[package]]
 name = "requests"
 version = "2.31.0"
 description = "Python HTTP for Humans."
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -2035,7 +1771,6 @@ use-chardet-on-py3 = ["chardet (>=3.0.2,<6)"]
 name = "rfc3986"
 version = "1.5.0"
 description = "Validating URI References per RFC 3986"
-category = "dev"
 optional = false
 python-versions = "*"
 files = [
@@ -2053,7 +1788,6 @@ idna2008 = ["idna"]
 name = "rich"
 version = "13.5.2"
 description = "Render rich text, tables, progress bars, syntax highlighting, markdown and more to the terminal"
-category = "main"
 optional = false
 python-versions = ">=3.7.0"
 files = [
@@ -2073,7 +1807,6 @@ jupyter = ["ipywidgets (>=7.5.1,<9)"]
 name = "setuptools"
 version = "68.0.0"
 description = "Easily download, build, install, upgrade, and uninstall Python packages"
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -2090,7 +1823,6 @@ testing-integration = ["build[virtualenv]", "filelock (>=3.4.0)", "jaraco.envs (
 name = "six"
 version = "1.16.0"
 description = "Python 2 and 3 compatibility utilities"
-category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
 files = [
@@ -2102,7 +1834,6 @@ files = [
 name = "smmap"
 version = "5.0.0"
 description = "A pure Python implementation of a sliding window memory map manager"
-category = "dev"
 optional = false
 python-versions = ">=3.6"
 files = [
@@ -2114,7 +1845,6 @@ files = [
 name = "sniffio"
 version = "1.3.0"
 description = "Sniff out which async library your code is running under"
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -2122,23 +1852,10 @@ files = [
     {file = "sniffio-1.3.0.tar.gz", hash = "sha256:e60305c5e5d314f5389259b7f22aaa33d8f7dee49763119234af3755c55b9101"},
 ]
 
-[[package]]
-name = "soupsieve"
-version = "2.4.1"
-description = "A modern CSS selector implementation for Beautiful Soup."
-category = "dev"
-optional = false
-python-versions = ">=3.7"
-files = [
-    {file = "soupsieve-2.4.1-py3-none-any.whl", hash = "sha256:1c1bfee6819544a3447586c889157365a27e10d88cde3ad3da0cf0ddf646feb8"},
-    {file = "soupsieve-2.4.1.tar.gz", hash = "sha256:89d12b2d5dfcd2c9e8c22326da9d9aa9cb3dfab0a83a024f05704076ee8d35ea"},
-]
-
 [[package]]
 name = "syrupy"
 version = "3.0.6"
 description = "Pytest Snapshot Test Utility"
-category = "dev"
 optional = false
 python-versions = ">=3.7,<4"
 files = [
@@ -2154,7 +1871,6 @@ pytest = ">=5.1.0,<8.0.0"
 name = "textual-dev"
 version = "1.1.0"
 description = "Development tools for working with Textual"
-category = "dev"
 optional = false
 python-versions = ">=3.7,<4.0"
 files = [
@@ -2173,7 +1889,6 @@ typing-extensions = ">=4.4.0,<5.0.0"
 name = "time-machine"
 version = "2.10.0"
 description = "Travel through time in your tests."
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -2240,7 +1955,6 @@ python-dateutil = "*"
 name = "toml"
 version = "0.10.2"
 description = "Python Library for Tom's Obvious, Minimal Language"
-category = "dev"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
 files = [
@@ -2252,7 +1966,6 @@ files = [
 name = "tomli"
 version = "2.0.1"
 description = "A lil' TOML parser"
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -2264,7 +1977,6 @@ files = [
 name = "typed-ast"
 version = "1.5.5"
 description = "a fork of Python 2 and 3 ast modules with type comment support"
-category = "dev"
 optional = false
 python-versions = ">=3.6"
 files = [
@@ -2315,7 +2027,6 @@ files = [
 name = "types-setuptools"
 version = "67.8.0.0"
 description = "Typing stubs for setuptools"
-category = "dev"
 optional = false
 python-versions = "*"
 files = [
@@ -2327,7 +2038,6 @@ files = [
 name = "typing-extensions"
 version = "4.7.1"
 description = "Backported and Experimental Type Hints for Python 3.7+"
-category = "main"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -2339,7 +2049,6 @@ files = [
 name = "tzdata"
 version = "2022.7"
 description = "Provider of IANA time zone data"
-category = "dev"
 optional = false
 python-versions = ">=2"
 files = [
@@ -2351,7 +2060,6 @@ files = [
 name = "uc-micro-py"
 version = "1.0.2"
 description = "Micro subset of unicode data files for linkify-it-py projects."
-category = "main"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -2366,7 +2074,6 @@ test = ["coverage", "pytest", "pytest-cov"]
 name = "urllib3"
 version = "2.0.4"
 description = "HTTP library with thread-safe connection pooling, file post, and more."
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -2384,7 +2091,6 @@ zstd = ["zstandard (>=0.18.0)"]
 name = "virtualenv"
 version = "20.24.4"
 description = "Virtual Python Environment builder"
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -2406,7 +2112,6 @@ test = ["covdefaults (>=2.3)", "coverage (>=7.2.7)", "coverage-enable-subprocess
 name = "watchdog"
 version = "3.0.0"
 description = "Filesystem events monitoring"
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -2446,7 +2151,6 @@ watchmedo = ["PyYAML (>=3.10)"]
 name = "yarl"
 version = "1.9.2"
 description = "Yet another URL library"
-category = "dev"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -2535,7 +2239,6 @@ typing-extensions = {version = ">=3.7.4", markers = "python_version < \"3.8\""}
 name = "zipp"
 version = "3.15.0"
 description = "Backport of pathlib-compatible object wrapper for zip files"
-category = "main"
 optional = false
 python-versions = ">=3.7"
 files = [
@@ -2550,4 +2253,4 @@ testing = ["big-O", "flake8 (<5)", "jaraco.functools", "jaraco.itertools", "more
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.7"
-content-hash = "5ac8aef69083d16bc38af16f22cc94ad14b8b70b5cff61e0c7d462c1d1a8a42c"
+content-hash = "3817b3d8b678845abb17cddd49d5a6ea5fb9d0083faa356ef232184a94312ba6"
diff --git a/pyproject.toml b/pyproject.toml
index 01c053476..0b6ea079c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -65,7 +65,7 @@ httpx = "^0.23.1"
 types-setuptools = "^67.2.0.1"
 textual-dev = "^1.1.0"
 pytest-asyncio = "*"
-pytest-textual-snapshot = "0.2.0"
+pytest-textual-snapshot = "*"
 
 [tool.black]
 includes = "src"
diff --git a/src/textual/_fuzzy.py b/src/textual/_fuzzy.py
index 2d9766e05..3fa4b0094 100644
--- a/src/textual/_fuzzy.py
+++ b/src/textual/_fuzzy.py
@@ -1,6 +1,9 @@
-from re import compile, escape
+from __future__ import annotations
+
+from re import IGNORECASE, compile, escape
 
 import rich.repr
+from rich.style import Style
 from rich.text import Text
 
 from ._cache import LRUCache
@@ -10,29 +13,61 @@ from ._cache import LRUCache
 class Matcher:
     """A fuzzy matcher."""
 
-    def __init__(self, query: str) -> None:
-        """
+    def __init__(
+        self,
+        query: str,
+        *,
+        match_style: Style | None = None,
+        case_sensitive: bool = False,
+    ) -> None:
+        """Initialise the fuzzy matching object.
+
         Args:
             query: A query as typed in by the user.
+            match_style: The style to use to highlight matched portions of a string.
+            case_sensitive: Should matching be case sensitive?
         """
-        self.query = query
-        self._query_regex = ".*?".join(f"({escape(character)})" for character in query)
-        self._query_regex_compiled = compile(self._query_regex)
+        self._query = query
+        self._match_style = Style(reverse=True) if match_style is None else match_style
+        self._query_regex = compile(
+            ".*?".join(f"({escape(character)})" for character in query),
+            flags=0 if case_sensitive else IGNORECASE,
+        )
         self._cache: LRUCache[str, float] = LRUCache(1024 * 4)
 
-    def match(self, input: str) -> float:
-        """Match the input against the query
+    @property
+    def query(self) -> str:
+        """The query string to look for."""
+        return self._query
+
+    @property
+    def match_style(self) -> Style:
+        """The style that will be used to highlight hits in the matched text."""
+        return self._match_style
+
+    @property
+    def query_pattern(self) -> str:
+        """The regular expression pattern built from the query."""
+        return self._query_regex.pattern
+
+    @property
+    def case_sensitive(self) -> bool:
+        """Is this matcher case sensitive?"""
+        return not bool(self._query_regex.flags & IGNORECASE)
+
+    def match(self, candidate: str) -> float:
+        """Match the candidate against the query.
 
         Args:
-            input: Input string to match against.
+            candidate: Candidate string to match against the query.
 
         Returns:
             Strength of the match from 0 to 1.
         """
-        cached = self._cache.get(input)
+        cached = self._cache.get(candidate)
         if cached is not None:
             return cached
-        match = self._query_regex_compiled.search(input)
+        match = self._query_regex.search(candidate)
         if match is None:
             score = 0.0
         else:
@@ -47,21 +82,21 @@ class Matcher:
                     group_count += 1
                 last_offset = offset
 
-            score = 1.0 - ((group_count - 1) / len(input))
-        self._cache[input] = score
+            score = 1.0 - ((group_count - 1) / len(candidate))
+        self._cache[candidate] = score
         return score
 
-    def highlight(self, input: str) -> Text:
-        """Highlight the input with the fuzzy match.
+    def highlight(self, candidate: str) -> Text:
+        """Highlight the candidate with the fuzzy match.
 
         Args:
-            input: User input.
+            candidate: The candidate string to match against the query.
 
         Returns:
-            A Text object with matched letters in bold.
+            A [rich.text.Text][`Text`] object with highlighted matches.
         """
-        match = self._query_regex_compiled.search(input)
-        text = Text(input)
+        match = self._query_regex.search(candidate)
+        text = Text(candidate)
         if match is None:
             return text
         assert match.lastindex is not None
@@ -69,14 +104,55 @@ class Matcher:
             match.span(group_no)[0] for group_no in range(1, match.lastindex + 1)
         ]
         for offset in offsets:
-            text.stylize("bold", offset, offset + 1)
+            text.stylize(self._match_style, offset, offset + 1)
 
         return text
 
 
 if __name__ == "__main__":
+    from itertools import permutations
+    from string import ascii_lowercase
+    from time import monotonic
+
     from rich import print
+    from rich.rule import Rule
 
     matcher = Matcher("foo.bar")
-    print(matcher.match("xz foo.bar sdf"))
-    print(matcher.highlight("xz foo.bar sdf"))
+    print(Rule())
+    print("Query is:", matcher.query)
+    print("Rule is:", matcher.query_pattern)
+    print(Rule())
+    candidates = (
+        "foo.bar",
+        " foo.bar ",
+        "Hello foo.bar world",
+        "f o o . b a r",
+        "f o o .bar",
+        "foo. b a r",
+        "Lots of text before the foo.bar",
+        "foo.bar up front and then lots of text afterwards",
+        "This has an o in it but does not have a match",
+        "Let's find one obvious match. But blat around always roughly.",
+    )
+    results = sorted(
+        [
+            (matcher.match(candidate), matcher.highlight(candidate))
+            for candidate in candidates
+        ],
+        key=lambda pair: pair[0],
+        reverse=True,
+    )
+    for score, highlight in results:
+        print(f"{score:.15f} '", highlight, "'", sep="")
+    print(Rule())
+
+    RUNS = 5
+    candidates = [
+        "".join(permutation) for permutation in permutations(ascii_lowercase[:10])
+    ]
+    matcher = Matcher(ascii_lowercase[:10])
+    start = monotonic()
+    for _ in range(RUNS):
+        for candidate in candidates:
+            _ = matcher.match(candidate)
+    print(f"{RUNS * len(candidates)} matches in {monotonic() - start:.5f} seconds")
diff --git a/src/textual/_system_commands_source.py b/src/textual/_system_commands_source.py
new file mode 100644
index 000000000..deacd7788
--- /dev/null
+++ b/src/textual/_system_commands_source.py
@@ -0,0 +1,56 @@
+"""A command palette command source for Textual system commands.
+
+This is a simple command source that makes the most obvious application
+actions available via the [command palette][textual.command_palette.CommandPalette].
+"""
+
+from .command_palette import CommandMatches, CommandSource, CommandSourceHit
+
+
+class SystemCommandSource(CommandSource):
+    """A [source][textual.command_palette.CommandSource] of command palette commands that run app-wide tasks.
+
+    Used by default in [`App.COMMAND_SOURCES`][textual.app.App.COMMAND_SOURCES].
+    """
+
+    async def search(self, query: str) -> CommandMatches:
+        """Handle a request to search for system commands that match the query.
+
+        Args:
+            user_input: The user input to be matched.
+
+        Yields:
+            Command source hits for use in the command palette.
+        """
+        # We're going to use Textual's builtin fuzzy matcher to find
+        # matching commands.
+        matcher = self.matcher(query)
+
+        # Loop over all applicable commands, find those that match and offer
+        # them up to the command palette.
+        for name, runnable, help_text in (
+            (
+                "Toggle light/dark mode",
+                self.app.action_toggle_dark,
+                "Toggle the application between light and dark mode",
+            ),
+            (
+                "Quit the application",
+                self.app.action_quit,
+                "Quit the application as soon as possible",
+            ),
+            (
+                "Ring the bell",
+                self.app.action_bell,
+                "Ring the terminal's 'bell'",
+            ),
+        ):
+            match = matcher.match(name)
+            if match > 0:
+                yield CommandSourceHit(
+                    match,
+                    matcher.highlight(name),
+                    runnable,
+                    name,
+                    help_text,
+                )
diff --git a/src/textual/app.py b/src/textual/app.py
index e04d42d5e..2991f51e2 100644
--- a/src/textual/app.py
+++ b/src/textual/app.py
@@ -68,11 +68,13 @@ from ._context import active_app, active_message_pump
 from ._context import message_hook as message_hook_context_var
 from ._event_broker import NoHandler, extract_handler_actions
 from ._path import CSSPathType, _css_path_type_as_list, _make_path_object_relative
+from ._system_commands_source import SystemCommandSource
 from ._wait import wait_for_idle
 from ._worker_manager import WorkerManager
 from .actions import ActionParseResult, SkipAction
 from .await_remove import AwaitRemove
 from .binding import Binding, BindingType, _Bindings
+from .command_palette import CommandPalette, CommandPaletteCallable, CommandSource
 from .css.query import NoMatches
 from .css.stylesheet import Stylesheet
 from .design import ColorSystem
@@ -323,8 +325,23 @@ class App(Generic[ReturnType], DOMNode):
     See also [the `Screen.SUB_TITLE` attribute][textual.screen.Screen.SUB_TITLE].
     """
 
+    ENABLE_COMMAND_PALETTE: ClassVar[bool] = True
+    """Should the [command palette][textual.command_palette.CommandPalette] be enabled for the application?"""
+
+    COMMAND_SOURCES: ClassVar[set[type[CommandSource]]] = {SystemCommandSource}
+    """The [command sources](/api/command_palette/) for the application.
+
+    This is the collection of [command sources][textual.command_palette.CommandSource]
+    that provide matched
+    commands to the [command palette][textual.command_palette.CommandPalette].
+
+    The default Textual command palette source is
+    [the Textual system-wide command source][textual._system_commands_source.SystemCommandSource].
+    """
+
     BINDINGS: ClassVar[list[BindingType]] = [
-        Binding("ctrl+c", "quit", "Quit", show=False, priority=True)
+        Binding("ctrl+c", "quit", "Quit", show=False, priority=True),
+        Binding("ctrl+@", "command_palette", show=False, priority=True),
     ]
 
     title: Reactive[str] = Reactive("", compute=False)
@@ -438,6 +455,14 @@ class App(Generic[ReturnType], DOMNode):
         The new value is always converted to string.
         """
 
+        self.use_command_palette: bool = self.ENABLE_COMMAND_PALETTE
+        """A flag to say if the application should use the command palette.
+
+        If set to `False` any call to
+        [`action_command_palette`][textual.app.App.action_command_palette]
+        will be ignored.
+        """
+
         self._logger = Logger(self._log)
 
         self._refresh_required = False
@@ -3003,3 +3028,8 @@ class App(Generic[ReturnType], DOMNode):
         """Clear all the current notifications."""
         self._notifications.clear()
         self._refresh_notifications()
+
+    def action_command_palette(self) -> None:
+        """Show the Textual command palette."""
+        if self.use_command_palette and not CommandPalette.is_open(self):
+            self.push_screen(CommandPalette(), callback=self.call_next)
diff --git a/src/textual/command_palette.py b/src/textual/command_palette.py
new file mode 100644
index 000000000..e1201a7c4
--- /dev/null
+++ b/src/textual/command_palette.py
@@ -0,0 +1,892 @@
+"""The Textual command palette."""
+
+from __future__ import annotations
+
+from abc import ABC, abstractmethod
+from asyncio import CancelledError, Queue, TimeoutError, wait_for
+from functools import total_ordering
+from time import monotonic
+from typing import (
+    TYPE_CHECKING,
+    Any,
+    AsyncGenerator,
+    AsyncIterator,
+    Callable,
+    ClassVar,
+    NamedTuple,
+)
+
+from rich.align import Align
+from rich.console import Group, RenderableType
+from rich.emoji import Emoji
+from rich.style import Style
+from rich.text import Text
+from rich.traceback import Traceback
+from typing_extensions import Final, TypeAlias
+
+from . import on, work
+from ._asyncio import create_task
+from ._fuzzy import Matcher
+from .binding import Binding, BindingType
+from .containers import Horizontal, Vertical
+from .events import Click, Mount
+from .reactive import var
+from .screen import ModalScreen, Screen
+from .timer import Timer
+from .widget import Widget
+from .widgets import Button, Input, LoadingIndicator, OptionList, Static
+from .widgets.option_list import Option
+from .worker import get_current_worker
+
+if TYPE_CHECKING:
+    from .app import App, ComposeResult
+
+__all__ = [
+    "CommandMatches",
+    "CommandPalette",
+    "CommandPaletteCallable",
+    "CommandSource",
+    "CommandSourceHit",
+    "Matcher",
+]
+
+
+CommandPaletteCallable: TypeAlias = Callable[[], Any]
+"""The type of a function that will be called when a command is selected from the command palette."""
+
+
+@total_ordering
+class CommandSourceHit(NamedTuple):
+    """Holds the details of a single command search hit."""
+
+    match_value: float
+    """The match value of the command hit.
+
+    The value should be between 0 (no match) and 1 (complete match).
+    """
+
+    match_display: RenderableType
+    """The Rich renderable representation of the hit.
+
+    Ideally a [rich Text object][rich.text.Text] object or similar.
+    """
+
+    command: CommandPaletteCallable
+    """The function to call when the command is chosen."""
+
+    command_text: str
+    """The command text associated with the hit, as plain text.
+
+    This is the text that will be placed into the `Input` field of the
+    [command palette][textual.command_palette.CommandPalette] when a
+    selection is made.
+    """
+
+    command_help: str | None = None
+    """Optional help text for the command."""
+
+    def __lt__(self, other: object) -> bool:
+        if isinstance(other, CommandSourceHit):
+            return self.match_value < other.match_value
+        return NotImplemented
+
+    def __eq__(self, other: object) -> bool:
+        if isinstance(other, CommandSourceHit):
+            return self.match_value == other.match_value
+        return NotImplemented
+
+
+CommandMatches: TypeAlias = AsyncIterator[CommandSourceHit]
+"""Return type for the command source match searching method."""
+
+
+class CommandSource(ABC):
+    """Base class for command palette command sources.
+
+    To create a source of commands inherit from this class and implement
+    [`search`][textual.command_palette.CommandSource.search].
+    """
+
+    def __init__(self, screen: Screen[Any], match_style: Style | None = None) -> None:
+        """Initialise the command source.
+
+        Args:
+            screen: A reference to the active screen.
+        """
+        self.__screen = screen
+        self.__match_style = match_style
+
+    @property
+    def focused(self) -> Widget | None:
+        """The currently-focused widget in the currently-active screen in the application.
+
+        If no widget has focus this will be `None`.
+        """
+        return self.__screen.focused
+
+    @property
+    def screen(self) -> Screen[object]:
+        """The currently-active screen in the application."""
+        return self.__screen
+
+    @property
+    def app(self) -> App[object]:
+        """A reference to the application."""
+        return self.__screen.app
+
+    @property
+    def match_style(self) -> Style | None:
+        """The preferred style to use when highlighting matching portions of the [`match_display`][textual.command_palette.CommandSourceHit.match_display]."""
+        return self.__match_style
+
+    def matcher(self, user_input: str, case_sensitive: bool = False) -> Matcher:
+        """Create a [fuzzy matcher][textual._fuzzy.Matcher] for the given user input.
+
+        Args:
+            user_input: The text that the user has input.
+            case_sensitive: Should match be case sensitive?
+
+        Returns:
+            A [fuzzy matcher][textual._fuzzy.Matcher] object for matching against candidate hits.
+        """
+        return Matcher(
+            user_input, match_style=self.match_style, case_sensitive=case_sensitive
+        )
+
+    @abstractmethod
+    async def search(self, query: str) -> CommandMatches:
+        """A request to search for commands relevant to the given query.
+
+        Args:
+            query: The user input to be matched.
+
+        Yields:
+            Instances of [`CommandSourceHit`][textual.command_palette.CommandSourceHit].
+        """
+        yield NotImplemented
+
+
+@total_ordering
+class Command(Option):
+    """Class that holds a command in the [`CommandList`][textual.command_palette.CommandList]."""
+
+    def __init__(
+        self,
+        prompt: RenderableType,
+        command: CommandSourceHit,
+        id: str | None = None,
+        disabled: bool = False,
+    ) -> None:
+        """Initialise the option.
+
+        Args:
+            prompt: The prompt for the option.
+            command: The details of the command associated with the option.
+            id: The optional ID for the option.
+            disabled: The initial enabled/disabled state. Enabled by default.
+        """
+        super().__init__(prompt, id, disabled)
+        self.command = command
+        """The details of the command associated with the option."""
+
+    def __lt__(self, other: object) -> bool:
+        if isinstance(other, Command):
+            return self.command < other.command
+        return NotImplemented
+
+    def __eq__(self, other: object) -> bool:
+        if isinstance(other, Command):
+            return self.command == other.command
+        return NotImplemented
+
+
+class CommandList(OptionList, can_focus=False):
+    """The command palette command list."""
+
+    DEFAULT_CSS = """
+    CommandList {
+        visibility: hidden;
+        border-top: blank;
+        border-bottom: hkey $accent;
+        border-left: none;
+        border-right: none;
+        height: auto;
+        max-height: 70vh;
+        background: $panel;
+    }
+
+    CommandList:focus {
+        border: blank;
+    }
+
+    CommandList.--visible {
+        visibility: visible;
+    }
+
+    CommandList.--populating {
+        border-bottom: none;
+    }
+
+    CommandList > .option-list--option-highlighted {
+        background: $accent;
+    }
+
+    CommandList > .option-list--option {
+        padding-left: 1;
+    }
+    """
+
+
+class SearchIcon(Static, inherit_css=False):
+    """Widget for displaying a search icon before the command input."""
+
+    DEFAULT_CSS = """
+    SearchIcon {
+        margin-left: 1;
+        margin-top: 1;
+        width: 2;
+    }
+    """
+
+    icon: var[str] = var(Emoji.replace(":magnifying_glass_tilted_right:"))
+    """The icon to display."""
+
+    def render(self) -> RenderableType:
+        """Render the icon.
+
+        Returns:
+            The icon renderable.
+        """
+        return self.icon
+
+
+class CommandInput(Input):
+    """The command palette input control."""
+
+    DEFAULT_CSS = """
+    CommandInput, CommandInput:focus {
+        border: blank;
+        width: 1fr;
+        background: $panel;
+        padding-left: 0;
+    }
+    """
+
+
+class CommandPalette(ModalScreen[CommandPaletteCallable], inherit_css=False):
+    """The Textual command palette."""
+
+    COMPONENT_CLASSES: ClassVar[set[str]] = {
+        "command-palette--help-text",
+        "command-palette--highlight",
+    }
+    """
+    | Class | Description |
+    | :- | :- |
+    | `command-palette--help-text` | Targets the help text of a matched command. |
+    | `command-palette--highlight` | Targets the highlights of a matched command. |
+    """
+
+    DEFAULT_CSS = """
+    CommandPalette {
+        background: $background 30%;
+        align-horizontal: center;
+    }
+
+    CommandPalette > .command-palette--help-text {
+        text-style: dim;
+        background: transparent;
+    }
+
+    CommandPalette > .command-palette--highlight {
+        text-style: bold reverse;
+    }
+
+    CommandPalette > Vertical {
+        margin-top: 3;
+        width: 90%;
+        height: 100%;
+        visibility: hidden;
+    }
+
+    CommandPalette #--input {
+        height: auto;
+        visibility: visible;
+        border: hkey $accent;
+        background: $panel;
+    }
+
+    CommandPalette #--input.--list-visible {
+        border-bottom: none;
+    }
+
+    CommandPalette #--input Label {
+        margin-top: 1;
+        margin-left: 1;
+    }
+
+    CommandPalette #--input Button {
+        min-width: 7;
+        margin-right: 1;
+    }
+
+    CommandPalette #--results {
+        overlay: screen;
+        height: auto;
+    }
+
+    CommandPalette LoadingIndicator {
+        height: auto;
+        visibility: hidden;
+        background: $panel;
+        border-bottom: hkey $accent;
+    }
+
+    CommandPalette LoadingIndicator.--visible {
+        visibility: visible;
+    }
+    """
+
+    BINDINGS: ClassVar[list[BindingType]] = [
+        Binding("ctrl+end, shift+end", "command_list('last')", show=False),
+        Binding("ctrl+home, shift+home", "command_list('first')", show=False),
+        Binding("down", "cursor_down", show=False),
+        Binding("escape", "escape", "Exit the command palette"),
+        Binding("pagedown", "command_list('page_down')", show=False),
+        Binding("pageup", "command_list('page_up')", show=False),
+        Binding("up", "command_list('cursor_up')", show=False),
+    ]
+    """
+    | Key(s) | Description |
+    | :- | :- |
+    | ctrl+end, shift+end | Jump to the last available commands. |
+    | ctrl+home, shift+home | Jump to the first available commands. |
+    | down | Navigate down through the available commands. |
+    | escape | Exit the command palette. |
+    | pagedown | Navigate down a page through the available commands. |
+    | pageup | Navigate up a page through the available commands. |
+    | up | Navigate up through the available commands. |
+    """
+
+    run_on_select: ClassVar[bool] = True
+    """A flag to say if a command should be run when selected by the user.
+
+    If `True` then when a user hits `Enter` on a command match in the result
+    list, or if they click on one with the mouse, the command will be
+    selected and run. If set to `False` the input will be filled with the
+    command and then `Enter` should be pressed on the keyboard or the 'go'
+    button should be pressed.
+    """
+
+    _list_visible: var[bool] = var(False, init=False)
+    """Internal reactive to toggle the visibility of the command list."""
+
+    _show_busy: var[bool] = var(False, init=False)
+    """Internal reactive to toggle the visibility of the busy indicator."""
+
+    _calling_screen: var[Screen[Any] | None] = var(None)
+    """A record of the screen that was active when we were called."""
+
+    _PALETTE_ID: Final[str] = "--command-palette"
+    """The internal ID for the command palette."""
+
+    def __init__(self) -> None:
+        """Initialise the command palette."""
+        super().__init__(id=self._PALETTE_ID)
+        self._selected_command: CommandSourceHit | None = None
+        """The command that was selected by the user."""
+        self._busy_timer: Timer | None = None
+        """Keeps track of if there's a busy indication timer in effect."""
+
+    @staticmethod
+    def is_open(app: App) -> bool:
+        """Is the command palette current open?
+
+        Args:
+            app: The app to test.
+
+        Returns:
+            `True` if the command palette is currently open, `False` if not.
+        """
+        return app.screen.id == CommandPalette._PALETTE_ID
+
+    @property
+    def _sources(self) -> set[type[CommandSource]]:
+        """The currently available command sources.
+
+        This is a combination of the command sources defined [in the
+        application][textual.app.App.COMMAND_SOURCES] and those [defined in
+        the current screen][textual.screen.Screen.COMMAND_SOURCES].
+        """
+        return (
+            set()
+            if self._calling_screen is None
+            else self.app.COMMAND_SOURCES | self._calling_screen.COMMAND_SOURCES
+        )
+
+    def compose(self) -> ComposeResult:
+        """Compose the command palette.
+
+        Returns:
+            The content of the screen.
+        """
+        with Vertical():
+            with Horizontal(id="--input"):
+                yield SearchIcon()
+                yield CommandInput(placeholder="Search...")
+                if not self.run_on_select:
+                    yield Button("\u25b6")
+            with Vertical(id="--results"):
+                yield CommandList()
+                yield LoadingIndicator()
+
+    def _on_click(self, event: Click) -> None:
+        """Handle the click event.
+
+        Args:
+            event: The click event.
+
+        This method is used to allow clicking on the 'background' as a
+        method of dismissing the palette.
+        """
+        if self.get_widget_at(event.screen_x, event.screen_y)[0] is self:
+            self.workers.cancel_all()
+            self.dismiss()
+
+    def _on_mount(self, _: Mount) -> None:
+        """Capture the calling screen."""
+        self._calling_screen = self.app.screen_stack[-2]
+
+    def _stop_busy_countdown(self) -> None:
+        """Stop any busy countdown that's in effect."""
+        if self._busy_timer is not None:
+            self._busy_timer.stop()
+            self._busy_timer = None
+
+    _BUSY_COUNTDOWN: Final[float] = 0.5
+    """How many seconds to wait for commands to come in before showing we're busy."""
+
+    def _start_busy_countdown(self) -> None:
+        """Start a countdown to showing that we're busy searching."""
+        self._stop_busy_countdown()
+
+        def _become_busy() -> None:
+            if self._list_visible:
+                self._show_busy = True
+
+        self._busy_timer = self._busy_timer = self.set_timer(
+            self._BUSY_COUNTDOWN, _become_busy
+        )
+
+    def _watch__list_visible(self) -> None:
+        """React to the list visible flag being toggled."""
+        self.query_one(CommandList).set_class(self._list_visible, "--visible")
+        self.query_one("#--input", Horizontal).set_class(
+            self._list_visible, "--list-visible"
+        )
+        if not self._list_visible:
+            self._show_busy = False
+
+    async def _watch__show_busy(self) -> None:
+        """React to the show busy flag being toggled.
+
+        This watcher adds or removes a busy indication depending on the
+        flag's state.
+        """
+        self.query_one(LoadingIndicator).set_class(self._show_busy, "--visible")
+        self.query_one(CommandList).set_class(self._show_busy, "--populating")
+
+    @staticmethod
+    async def _consume(
+        source: CommandMatches, commands: Queue[CommandSourceHit]
+    ) -> None:
+        """Consume a source of matching commands, feeding the given command queue.
+
+        Args:
+            source: The source to consume.
+            commands: The command queue to feed.
+        """
+        async for hit in source:
+            await commands.put(hit)
+
+    async def _search_for(
+        self, search_value: str
+    ) -> AsyncGenerator[CommandSourceHit, bool]:
+        """Search for a given search value amongst all of the command sources.
+
+        Args:
+            search_value: The value to search for.
+
+        Yields:
+            The hits made amongst the registered command sources.
+        """
+
+        # Get the style for highlighted parts of a hit match.
+        match_style = self._sans_background(
+            self.get_component_rich_style("command-palette--highlight")
+        )
+
+        # Set up a queue to stream in the command hits from all the sources.
+        commands: Queue[CommandSourceHit] = Queue()
+
+        # Fire up an instance of each command source, inside a task, and
+        # have them go start looking for matches.
+        assert self._calling_screen is not None
+        searches = [
+            create_task(
+                self._consume(
+                    source(self._calling_screen, match_style).search(search_value),
+                    commands,
+                )
+            )
+            for source in self._sources
+        ]
+
+        # Set up a delay for showing that we're busy.
+        self._start_busy_countdown()
+
+        # Assume the search isn't aborted.
+        aborted = False
+
+        # Now, while there's some task running...
+        while not aborted and any(not search.done() for search in searches):
+            try:
+                # ...briefly wait for something on the stack. If we get
+                # something yield it up to our caller.
+                aborted = yield await wait_for(commands.get(), 0.1)
+            except TimeoutError:
+                # A timeout is fine. We're just going to go back round again
+                # and see if anything else has turned up.
+                pass
+            except CancelledError:
+                # A cancelled error means things are being aborted.
+                aborted = True
+            else:
+                # There was no timeout, which means that we managed to yield
+                # up that command; we're done with it so let the queue know.
+                commands.task_done()
+
+        # Check through all the finished searches, see if any have
+        # exceptions, and log them. In most other circumstances we'd
+        # re-raise the exception and quit the application, but the decision
+        # has been made to find and log exceptions with command sources.
+        #
+        # https://github.com/Textualize/textual/pull/3058#discussion_r1310051855
+        for search in searches:
+            if search.done():
+                exception = search.exception()
+                if exception is not None:
+                    self.log.error(
+                        Traceback.from_exception(
+                            type(exception), exception, exception.__traceback__
+                        )
+                    )
+
+        # Having finished the main processing loop, we're not busy any more.
+        # Anything left in the queue (see next) will fall out more or less
+        # instantly.
+        self._stop_busy_countdown()
+
+        # If all the sources are pretty fast it could be that we've reached
+        # this point but the queue isn't empty yet. So here we flush the
+        # queue of anything left.
+        while not aborted and not commands.empty():
+            aborted = yield await commands.get()
+
+        # If we were aborted, ensure that all of the searches are cancelled.
+        if aborted:
+            for search in searches:
+                search.cancel()
+
+    @staticmethod
+    def _sans_background(style: Style) -> Style:
+        """Returns the given style minus the background color.
+
+        Args:
+            style: The style to remove the color from.
+
+        Returns:
+            The given style, minus its background.
+        """
+        # Here we're pulling out all of the styles *minus* the background.
+        # This should probably turn into a utility method on Style
+        # eventually. The reason for this is we want the developer to be
+        # able to style the help text with a component class, but we want
+        # the background to always be the background at any given moment in
+        # the context of an OptionList. At the moment this act of copying
+        # sans bgcolor seems to be the only way to achieve this.
+        return Style(
+            blink2=style.blink2,
+            blink=style.blink,
+            bold=style.bold,
+            color=style.color,
+            conceal=style.conceal,
+            dim=style.dim,
+            encircle=style.encircle,
+            frame=style.frame,
+            italic=style.italic,
+            link=style.link,
+            overline=style.overline,
+            reverse=style.reverse,
+            strike=style.strike,
+            underline2=style.underline2,
+            underline=style.underline,
+        )
+
+    def _refresh_command_list(
+        self, command_list: CommandList, commands: list[Command], clear_current: bool
+    ) -> None:
+        """Refresh the command list.
+
+        Args:
+            command_list: The widget that shows the list of commands.
+            commands: The commands to show in the widget.
+            clear_current: Should the current content of the list be cleared first?
+        """
+        # For the moment, this is a fairly naive approach to populating the
+        # command list with a sorted list of commands. Every time we add a
+        # new one we're nuking the list of options and populating them
+        # again. If this turns out to not be a great approach, we may try
+        # and get a lot smarter with this (ideally OptionList will grow a
+        # method to sort its content in an efficient way; but for now we'll
+        # go with "worse is better" wisdom).
+        highlighted = (
+            command_list.get_option_at_index(command_list.highlighted)
+            if command_list.highlighted is not None and not clear_current
+            else None
+        )
+        command_list.clear_options().add_options(sorted(commands, reverse=True))
+        if highlighted is not None:
+            command_list.highlighted = command_list.get_option_index(highlighted.id)
+
+    _RESULT_BATCH_TIME: Final[float] = 0.25
+    """How long to wait before adding commands to the command list."""
+
+    _NO_MATCHES: Final[str] = "--no-matches"
+    """The ID to give the disabled option that shows there were no matches."""
+
+    @work(exclusive=True)
+    async def _gather_commands(self, search_value: str) -> None:
+        """Gather up all of the commands that match the search value.
+
+        Args:
+            search_value: The value to search for.
+        """
+
+        # We'll potentially use the help text style a lot so let's grab it
+        # the once for use in the loop further down.
+        help_style = self._sans_background(
+            self.get_component_rich_style("command-palette--help-text")
+        )
+
+        # The list to hold on to the commands we've gathered from the
+        # command sources.
+        gathered_commands: list[Command] = []
+
+        # Get a reference to the widget that we're going to drop the
+        # (display of) commands into.
+        command_list = self.query_one(CommandList)
+
+        # If there's just one option in the list, and it's the item that
+        # tells the user there were no matches, let's remove that. We're
+        # starting a new search so we don't want them thinking there's no
+        # matches already.
+        if (
+            command_list.option_count == 1
+            and command_list.get_option_at_index(0).id == self._NO_MATCHES
+        ):
+            command_list.remove_option(self._NO_MATCHES)
+
+        # Each command will receive a sequential ID. This is going to be
+        # used to find commands back again when we update the visible list
+        # and want to settle the selection back on the command it was on.
+        command_id = 0
+
+        # We're going to be checking in on the worker as we loop around, so
+        # grab a reference to that.
+        worker = get_current_worker()
+
+        # We're ready to show results, ensure the list is visible.
+        self._list_visible = True
+
+        # Go into a busy mode.
+        self._show_busy = False
+
+        # A flag to keep track of if the current content of the command hit
+        # list needs to be cleared. The initial clear *should* be in
+        # `_input`, but doing so caused an unsightly "flash" of the list; so
+        # here we sacrifice "correct" code for a better-looking UI.
+        clear_current = True
+
+        # We're going to batch updates over time, so start off pretending
+        # we've just done an update.
+        last_update = monotonic()
+
+        # Kick off the search, grabbing the iterator.
+        search_routine = self._search_for(search_value)
+        search_results = search_routine.__aiter__()
+
+        # We're going to be doing the send/await dance in this code, so we
+        # need to grab the first yielded command to start things off.
+        try:
+            hit = await search_results.__anext__()
+        except StopAsyncIteration:
+            # We've been stopped before we've even really got going, likely
+            # because the user is very quick on the keyboard.
+            hit = None
+
+        while hit:
+            # Turn the command into something for display, and add it to the
+            # list of commands that have been gathered so far.
+            prompt = hit.match_display
+            if hit.command_help:
+                prompt = Group(prompt, Text(hit.command_help, style=help_style))
+            gathered_commands.append(Command(prompt, hit, id=str(command_id)))
+
+            # Before we go making any changes to the UI, we do a quick
+            # double-check that the worker hasn't been cancelled. There's
+            # little point in doing UI work on a value that isn't needed any
+            # more.
+            if worker.is_cancelled:
+                break
+
+            # Having made it this far, it's safe to update the list of
+            # commands that match the input. Note that we batch up the
+            # results and only refresh the list once every so often; this
+            # helps reduce how much UI work needs to be done, but at the
+            # same time we keep the update frequency often enough so that it
+            # looks like things are moving along.
+            now = monotonic()
+            if (now - last_update) > self._RESULT_BATCH_TIME:
+                self._refresh_command_list(
+                    command_list, gathered_commands, clear_current
+                )
+                clear_current = False
+                last_update = now
+
+            # Bump the ID.
+            command_id += 1
+
+            # Finally, get the available command from the incoming queue;
+            # note that we send the worker cancelled status down into the
+            # search method.
+            try:
+                hit = await search_routine.asend(worker.is_cancelled)
+            except StopAsyncIteration:
+                break
+
+        # On the way out, if we're still in play, ensure everything has been
+        # dropped into the command list.
+        if not worker.is_cancelled:
+            self._refresh_command_list(command_list, gathered_commands, clear_current)
+
+        # One way or another, we're not busy any more.
+        self._show_busy = False
+
+        # If we didn't get any hits, and we're not cancelled, that would
+        # mean nothing was found. Give the user positive feedback to that
+        # effect.
+        if command_list.option_count == 0 and not worker.is_cancelled:
+            command_list.add_option(
+                Option(
+                    Align.center(Text("No matches found")),
+                    disabled=True,
+                    id=self._NO_MATCHES,
+                )
+            )
+
+    @on(Input.Changed)
+    def _input(self, event: Input.Changed) -> None:
+        """React to input in the command palette.
+
+        Args:
+            event: The input event.
+        """
+        self.workers.cancel_all()
+        search_value = event.value.strip()
+        if search_value:
+            self._gather_commands(search_value)
+        else:
+            self._list_visible = False
+            self.query_one(CommandList).clear_options()
+
+    @on(OptionList.OptionSelected)
+    def _select_command(self, event: OptionList.OptionSelected) -> None:
+        """React to a command being selected from the dropdown.
+
+        Args:
+            event: The option selection event.
+        """
+        event.stop()
+        self.workers.cancel_all()
+        input = self.query_one(CommandInput)
+        with self.prevent(Input.Changed):
+            assert isinstance(event.option, Command)
+            input.value = str(event.option.command.command_text)
+            self._selected_command = event.option.command
+        input.action_end()
+        self._list_visible = False
+        self.query_one(CommandList).clear_options()
+        if self.run_on_select:
+            self._select_or_command()
+
+    @on(Input.Submitted)
+    @on(Button.Pressed)
+    def _select_or_command(self) -> None:
+        """Depending on context, select or execute a command."""
+        # If the list is visible, that means we're in "pick a command"
+        # mode...
+        if self._list_visible:
+            # ...so if nothing in the list is highlighted yet...
+            if self.query_one(CommandList).highlighted is None:
+                # ...cause the first completion to be highlighted.
+                self._action_cursor_down()
+            else:
+                # The list is visible, something is highlighted, the user
+                # made a selection "gesture"; let's go select it!
+                self._action_command_list("select")
+        else:
+            # The list isn't visible, which means that if we have a
+            # command...
+            if self._selected_command is not None:
+                # ...we should return it to the parent screen and let it
+                # decide what to do with it (hopefully it'll run it).
+                self.workers.cancel_all()
+                self.dismiss(self._selected_command.command)
+
+    def _action_escape(self) -> None:
+        """Handle a request to escape out of the command palette."""
+        if self._list_visible:
+            self._list_visible = False
+        else:
+            self.workers.cancel_all()
+            self.dismiss()
+
+    def _action_command_list(self, action: str) -> None:
+        """Pass an action on to the [`CommandList`][textual.command_palette.CommandList].
+
+        Args:
+            action: The action to pass on to the [`CommandList`][textual.command_palette.CommandList].
+        """
+        try:
+            command_action = getattr(self.query_one(CommandList), f"action_{action}")
+        except AttributeError:
+            return
+        command_action()
+
+    def _action_cursor_down(self) -> None:
+        """Handle the cursor down action.
+
+        This allows the cursor down key to either open the command list, if
+        it's closed but has options, or if it's open with options just
+        cursor through them.
+        """
+        commands = self.query_one(CommandList)
+        if commands.option_count and not self._list_visible:
+            self._list_visible = True
+            commands.highlighted = 0
+        elif (
+            commands.option_count
+            and not commands.get_option_at_index(0).id == self._NO_MATCHES
+        ):
+            self._action_command_list("cursor_down")
diff --git a/src/textual/screen.py b/src/textual/screen.py
index a999930c8..88df054aa 100644
--- a/src/textual/screen.py
+++ b/src/textual/screen.py
@@ -49,6 +49,8 @@ from .widgets._toast import ToastRack
 if TYPE_CHECKING:
     from typing_extensions import Final
 
+    from .command_palette import CommandSource
+
     # Unused & ignored imports are needed for the docs to link to these objects:
     from .errors import NoWidget  # type: ignore  # noqa: F401
     from .message_pump import MessagePump
@@ -155,6 +157,9 @@ class Screen(Generic[ScreenResultType], Widget):
     title: Reactive[str | None] = Reactive(None, compute=False)
     """Screen title to override [the app title][textual.app.App.title]."""
 
+    COMMAND_SOURCES: ClassVar[set[type[CommandSource]]] = set()
+    """The [command sources](/api/command_palette/) for the screen."""
+
     BINDINGS = [
         Binding("tab", "focus_next", "Focus Next", show=False),
         Binding("shift+tab", "focus_previous", "Focus Previous", show=False),
diff --git a/tests/command_palette/test_click_away.py b/tests/command_palette/test_click_away.py
new file mode 100644
index 000000000..e2fe6915c
--- /dev/null
+++ b/tests/command_palette/test_click_away.py
@@ -0,0 +1,30 @@
+from textual.app import App
+from textual.command_palette import (
+    CommandMatches,
+    CommandPalette,
+    CommandSource,
+    CommandSourceHit,
+)
+
+
+class SimpleSource(CommandSource):
+    async def search(self, query: str) -> CommandMatches:
+        def goes_nowhere_does_nothing() -> None:
+            pass
+
+        yield CommandSourceHit(1, query, goes_nowhere_does_nothing, query)
+
+
+class CommandPaletteApp(App[None]):
+    COMMAND_SOURCES = {SimpleSource}
+
+    def on_mount(self) -> None:
+        self.action_command_palette()
+
+
+async def test_clicking_outside_command_palette_closes_it() -> None:
+    """Clicking 'outside' the command palette should make it go away."""
+    async with CommandPaletteApp().run_test() as pilot:
+        assert len(pilot.app.query(CommandPalette)) == 1
+        await pilot.click()
+        assert len(pilot.app.query(CommandPalette)) == 0
diff --git a/tests/command_palette/test_command_source_environment.py b/tests/command_palette/test_command_source_environment.py
new file mode 100644
index 000000000..11e632bb7
--- /dev/null
+++ b/tests/command_palette/test_command_source_environment.py
@@ -0,0 +1,45 @@
+from __future__ import annotations
+
+from textual.app import App, ComposeResult
+from textual.command_palette import (
+    CommandMatches,
+    CommandPalette,
+    CommandSource,
+    CommandSourceHit,
+)
+from textual.screen import Screen
+from textual.widget import Widget
+from textual.widgets import Input
+
+
+class SimpleSource(CommandSource):
+    environment: set[tuple[App, Screen, Widget | None]] = set()
+
+    async def search(self, _: str) -> CommandMatches:
+        def goes_nowhere_does_nothing() -> None:
+            pass
+
+        SimpleSource.environment.add((self.app, self.screen, self.focused))
+        yield CommandSourceHit(1, "Hit", goes_nowhere_does_nothing, "Hit")
+
+
+class CommandPaletteApp(App[None]):
+    COMMAND_SOURCES = {SimpleSource}
+
+    def compose(self) -> ComposeResult:
+        yield Input()
+
+    def on_mount(self) -> None:
+        self.action_command_palette()
+
+
+async def test_command_source_environment() -> None:
+    """The command source should see the app and default screen."""
+    async with CommandPaletteApp().run_test() as pilot:
+        base_screen = pilot.app.query_one(CommandPalette)._calling_screen
+        assert base_screen is not None
+        await pilot.press(*"test")
+        assert len(SimpleSource.environment) == 1
+        assert SimpleSource.environment == {
+            (pilot.app, base_screen, base_screen.query_one(Input))
+        }
diff --git a/tests/command_palette/test_declare_sources.py b/tests/command_palette/test_declare_sources.py
new file mode 100644
index 000000000..cac9f5205
--- /dev/null
+++ b/tests/command_palette/test_declare_sources.py
@@ -0,0 +1,102 @@
+from textual.app import App
+from textual.command_palette import (
+    CommandMatches,
+    CommandPalette,
+    CommandSource,
+    CommandSourceHit,
+)
+from textual.screen import Screen
+
+
+async def test_sources_with_no_known_screen() -> None:
+    """A command palette with no known screen should have an empty source set."""
+    assert CommandPalette()._sources == set()
+
+
+class ExampleCommandSource(CommandSource):
+    async def search(self, _: str) -> CommandMatches:
+        def goes_nowhere_does_nothing() -> None:
+            pass
+
+        yield CommandSourceHit(1, "Hit", goes_nowhere_does_nothing, "Hit")
+
+
+class AppWithActiveCommandPalette(App[None]):
+    def on_mount(self) -> None:
+        self.action_command_palette()
+
+
+class AppWithNoSources(AppWithActiveCommandPalette):
+    pass
+
+
+async def test_no_app_command_sources() -> None:
+    """An app with no sources declared should work fine."""
+    async with AppWithNoSources().run_test() as pilot:
+        assert pilot.app.query_one(CommandPalette)._sources == App.COMMAND_SOURCES
+
+
+class AppWithSources(AppWithActiveCommandPalette):
+    COMMAND_SOURCES = {ExampleCommandSource}
+
+
+async def test_app_command_sources() -> None:
+    """Command sources declared on an app should be in the command palette."""
+    async with AppWithSources().run_test() as pilot:
+        assert (
+            pilot.app.query_one(CommandPalette)._sources
+            == AppWithSources.COMMAND_SOURCES
+        )
+
+
+class AppWithInitialScreen(App[None]):
+    def __init__(self, screen: Screen) -> None:
+        super().__init__()
+        self._test_screen = screen
+
+    def on_mount(self) -> None:
+        self.push_screen(self._test_screen)
+
+
+class ScreenWithNoSources(Screen[None]):
+    def on_mount(self) -> None:
+        self.app.action_command_palette()
+
+
+async def test_no_screen_command_sources() -> None:
+    """An app with a screen with no sources declared should work fine."""
+    async with AppWithInitialScreen(ScreenWithNoSources()).run_test() as pilot:
+        assert pilot.app.query_one(CommandPalette)._sources == App.COMMAND_SOURCES
+
+
+class ScreenWithSources(ScreenWithNoSources):
+    COMMAND_SOURCES = {ExampleCommandSource}
+
+
+async def test_screen_command_sources() -> None:
+    """Command sources declared on a screen should be in the command palette."""
+    async with AppWithInitialScreen(ScreenWithSources()).run_test() as pilot:
+        assert (
+            pilot.app.query_one(CommandPalette)._sources
+            == App.COMMAND_SOURCES | ScreenWithSources.COMMAND_SOURCES
+        )
+
+
+class AnotherCommandSource(ExampleCommandSource):
+    pass
+
+
+class CombinedSourceApp(App[None]):
+    COMMAND_SOURCES = {AnotherCommandSource}
+
+    def on_mount(self) -> None:
+        self.push_screen(ScreenWithSources())
+
+
+async def test_app_and_screen_command_sources_combine() -> None:
+    """If an app and the screen have command sources they should combine."""
+    async with CombinedSourceApp().run_test() as pilot:
+        assert (
+            pilot.app.query_one(CommandPalette)._sources
+            == CombinedSourceApp.COMMAND_SOURCES | ScreenWithSources.COMMAND_SOURCES
+        )
diff --git a/tests/command_palette/test_escaping.py b/tests/command_palette/test_escaping.py
new file mode 100644
index 000000000..1dbf48337
--- /dev/null
+++ b/tests/command_palette/test_escaping.py
@@ -0,0 +1,55 @@
+from textual.app import App
+from textual.command_palette import (
+    CommandMatches,
+    CommandPalette,
+    CommandSource,
+    CommandSourceHit,
+)
+
+
+class SimpleSource(CommandSource):
+    async def search(self, query: str) -> CommandMatches:
+        def goes_nowhere_does_nothing() -> None:
+            pass
+
+        yield CommandSourceHit(1, query, goes_nowhere_does_nothing, query)
+
+
+class CommandPaletteApp(App[None]):
+    COMMAND_SOURCES = {SimpleSource}
+
+    def on_mount(self) -> None:
+        self.action_command_palette()
+
+
+async def test_escape_closes_when_no_list_visible() -> None:
+    """Pressing escape when no list is visible should close the command palette."""
+    async with CommandPaletteApp().run_test() as pilot:
+        assert len(pilot.app.query(CommandPalette)) == 1
+        await pilot.press("escape")
+        assert len(pilot.app.query(CommandPalette)) == 0
+
+
+async def test_escape_does_not_close_when_list_visible() -> None:
+    """Pressing escape when a hit list is visible should not close the command palette."""
+    async with CommandPaletteApp().run_test() as pilot:
+        assert len(pilot.app.query(CommandPalette)) == 1
+        await pilot.press("a")
+        await pilot.press("escape")
+        assert len(pilot.app.query(CommandPalette)) == 1
+        await pilot.press("escape")
+        assert len(pilot.app.query(CommandPalette)) == 0
+
+
+async def test_down_arrow_should_undo_closing_of_list_via_escape() -> None:
+    """Down arrow should reopen the hit list if escape closed it before."""
+    async with CommandPaletteApp().run_test() as pilot:
+        assert len(pilot.app.query(CommandPalette)) == 1
+        await pilot.press("a")
+        await pilot.press("escape")
+        assert len(pilot.app.query(CommandPalette)) == 1
+        await pilot.press("down")
+        await pilot.press("escape")
+        assert len(pilot.app.query(CommandPalette)) == 1
+        await pilot.press("escape")
+        assert len(pilot.app.query(CommandPalette)) == 0
diff --git a/tests/command_palette/test_interaction.py b/tests/command_palette/test_interaction.py
new file mode 100644
index 000000000..9dcbb90bb
--- /dev/null
+++ b/tests/command_palette/test_interaction.py
@@ -0,0 +1,72 @@
+from textual.app import App
+from textual.command_palette import (
+    CommandList,
+    CommandMatches,
+    CommandPalette,
+    CommandSource,
+    CommandSourceHit,
+)
+
+
+class SimpleSource(CommandSource):
+    async def search(self, query: str) -> CommandMatches:
+        def goes_nowhere_does_nothing() -> None:
+            pass
+
+        for _ in range(100):
+            yield CommandSourceHit(1, query, goes_nowhere_does_nothing, query)
+
+
+class CommandPaletteApp(App[None]):
+    COMMAND_SOURCES = {SimpleSource}
+
+    def on_mount(self) -> None:
+        self.action_command_palette()
+
+
+async def test_initial_list_no_highlight() -> None:
+    """When the list initially appears, nothing will be highlighted."""
+    async with CommandPaletteApp().run_test() as pilot:
+        assert len(pilot.app.query(CommandPalette)) == 1
+        assert pilot.app.query_one(CommandList).visible is False
+        await pilot.press("a")
+        assert pilot.app.query_one(CommandList).visible is True
+        assert pilot.app.query_one(CommandList).highlighted is None
+
+
+async def test_down_arrow_selects_an_item() -> None:
+    """Typing in a search value then pressing down should select a command."""
+    async with CommandPaletteApp().run_test() as pilot:
+        assert len(pilot.app.query(CommandPalette)) == 1
+        assert pilot.app.query_one(CommandList).visible is False
+        await pilot.press("a")
+        assert pilot.app.query_one(CommandList).visible is True
+        assert pilot.app.query_one(CommandList).highlighted is None
+        await pilot.press("down")
+        assert pilot.app.query_one(CommandList).highlighted is not None
+
+
+async def test_enter_selects_an_item() -> None:
+    """Typing in a search value then pressing enter should select a command."""
+    async with CommandPaletteApp().run_test() as pilot:
+        assert len(pilot.app.query(CommandPalette)) == 1
+        assert pilot.app.query_one(CommandList).visible is False
+        await pilot.press("a")
+        assert pilot.app.query_one(CommandList).visible is True
+        assert pilot.app.query_one(CommandList).highlighted is None
+        await pilot.press("enter")
+        assert pilot.app.query_one(CommandList).highlighted is not None
+
+
+async def test_selection_of_command_closes_command_palette() -> None:
+    """Selecting a command from the list should close the list."""
+    async with CommandPaletteApp().run_test() as pilot:
+        assert len(pilot.app.query(CommandPalette)) == 1
+        assert pilot.app.query_one(CommandList).visible is False
+        await pilot.press("a")
+        assert pilot.app.query_one(CommandList).visible is True
+        assert pilot.app.query_one(CommandList).highlighted is None
+        await pilot.press("enter")
+        assert pilot.app.query_one(CommandList).highlighted is not None
+        await pilot.press("enter")
+        assert len(pilot.app.query(CommandPalette)) == 0
diff --git a/tests/command_palette/test_no_results.py b/tests/command_palette/test_no_results.py
new file mode 100644
index 000000000..9ea99185d
--- /dev/null
+++ b/tests/command_palette/test_no_results.py
@@ -0,0 +1,25 @@
+from textual.app import App
+from textual.command_palette import CommandPalette
+from textual.widgets import OptionList
+
+
+class CommandPaletteApp(App[None]):
+    COMMAND_SOURCES = set()
+
+    def on_mount(self) -> None:
+        self.action_command_palette()
+
+
+async def test_no_results() -> None:
+    """Receiving no results from a search for a command should not be a problem."""
+    async with CommandPaletteApp().run_test() as pilot:
+        assert len(pilot.app.query(CommandPalette)) == 1
+        results = pilot.app.screen.query_one(OptionList)
+        assert results.visible is False
+        assert results.option_count == 0
+        await pilot.press("a")
+        await pilot.pause()
+        assert results.visible is True
+        assert results.option_count == 1
+        assert "No matches found" in str(results.get_option_at_index(0).prompt)
+        assert results.get_option_at_index(0).disabled is True
diff --git a/tests/command_palette/test_run_on_select.py b/tests/command_palette/test_run_on_select.py
new file mode 100644
index 000000000..9b010bb3f
--- /dev/null
+++ b/tests/command_palette/test_run_on_select.py
@@ -0,0 +1,72 @@
+from functools import partial
+
+from textual.app import App
+from textual.command_palette import (
+    CommandMatches,
+    CommandPalette,
+    CommandSource,
+    CommandSourceHit,
+)
+from textual.widgets import Input
+
+
+class SimpleSource(CommandSource):
+    async def search(self, _: str) -> CommandMatches:
+        def goes_nowhere_does_nothing(selection: int) -> None:
+            assert isinstance(self.app, CommandPaletteRunOnSelectApp)
+            self.app.selection = selection
+
+        for n in range(100):
+            yield CommandSourceHit(
+                n + 1 / 100,
+                str(n),
+                partial(goes_nowhere_does_nothing, n),
+                str(n),
+                f"This is help for {n}",
+            )
+
+
+class CommandPaletteRunOnSelectApp(App[None]):
+    COMMAND_SOURCES = {SimpleSource}
+
+    def __init__(self) -> None:
+        super().__init__()
+        self.selection: int | None = None
+
+
+async def test_with_run_on_select_on() -> None:
+    """With run on select on, the callable should be instantly run."""
+    async with CommandPaletteRunOnSelectApp().run_test() as pilot:
+        save = CommandPalette.run_on_select
+        CommandPalette.run_on_select = True
+        assert isinstance(pilot.app, CommandPaletteRunOnSelectApp)
+        pilot.app.action_command_palette()
+        await pilot.press("0")
+        await pilot.app.query_one(CommandPalette).workers.wait_for_complete()
+        await pilot.press("down")
+        await pilot.press("enter")
+        assert pilot.app.selection is not None
+        CommandPalette.run_on_select = save
+
+
+class CommandPaletteDoNotRunOnSelectApp(CommandPaletteRunOnSelectApp):
+    def __init__(self) -> None:
+        super().__init__()
+
+
+async def test_with_run_on_select_off() -> None:
+    """With run on select off, the callable should not be instantly run."""
+    async with CommandPaletteDoNotRunOnSelectApp().run_test() as pilot:
+        save = CommandPalette.run_on_select
+        CommandPalette.run_on_select = False
+        assert isinstance(pilot.app, CommandPaletteDoNotRunOnSelectApp)
+        pilot.app.action_command_palette()
+        await pilot.press("0")
+        await pilot.app.query_one(CommandPalette).workers.wait_for_complete()
+        await pilot.press("down")
+        await pilot.press("enter")
+        assert pilot.app.selection is None
+        assert pilot.app.query_one(Input).value != ""
+        await pilot.press("enter")
+        assert pilot.app.selection is not None
+        CommandPalette.run_on_select = save
diff --git a/tests/snapshot_tests/__snapshots__/test_snapshots.ambr b/tests/snapshot_tests/__snapshots__/test_snapshots.ambr
index 65b7ed96c..11e7c0d64 100644
--- a/tests/snapshot_tests/__snapshots__/test_snapshots.ambr
+++ b/tests/snapshot_tests/__snapshots__/test_snapshots.ambr
@@ -1855,6 +1855,166 @@
   
   '''
 # ---
+# name: test_command_palette
+  '''
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+          font-weight: 700;
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+          font-variant-east-asian: full-width;
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+      .terminal-3513349566-title {
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+  '''
+# ---
 # name: test_content_switcher_example_initial
   '''
   <svg class="rich-terminal" viewBox="0 0 994 635.5999999999999" xmlns="http://www.w3.org/2000/svg">
diff --git a/tests/snapshot_tests/snapshot_apps/command_palette.py b/tests/snapshot_tests/snapshot_apps/command_palette.py
new file mode 100644
index 000000000..06e1a3589
--- /dev/null
+++ b/tests/snapshot_tests/snapshot_apps/command_palette.py
@@ -0,0 +1,25 @@
+from textual.app import App
+from textual.command_palette import CommandSource, CommandMatches, CommandSourceHit
+
+class TestSource(CommandSource):
+
+    def goes_nowhere_does_nothing(self) -> None:
+        pass
+
+    async def search(self, query: str) -> CommandMatches:
+        matcher = self.matcher(query)
+        for n in range(10):
+            command = f"This is a test of this code {n}"
+            yield CommandSourceHit(
+                n/10, matcher.highlight(command), self.goes_nowhere_does_nothing, command
+            )
+
+class CommandPaletteApp(App[None]):
+
+    COMMAND_SOURCES = {TestSource}
+
+    def on_mount(self) -> None:
+        self.action_command_palette()
+
+if __name__ == "__main__":
+    CommandPaletteApp().run()
diff --git a/tests/snapshot_tests/test_snapshots.py b/tests/snapshot_tests/test_snapshots.py
index 13a759d23..34500c63e 100644
--- a/tests/snapshot_tests/test_snapshots.py
+++ b/tests/snapshot_tests/test_snapshots.py
@@ -599,6 +599,16 @@ def test_tooltips_in_compound_widgets(snap_compare):
     assert snap_compare(SNAPSHOT_APPS_DIR / "tooltips.py", run_before=run_before)
 
 
+def test_command_palette(snap_compare) -> None:
+
+    from textual.command_palette import CommandPalette
+
+    async def run_before(pilot) -> None:
+        await pilot.press("ctrl+@")
+        await pilot.press("A")
+        await pilot.app.query_one(CommandPalette).workers.wait_for_complete()
+    assert snap_compare(SNAPSHOT_APPS_DIR / "command_palette.py", run_before=run_before)
+
 # --- textual-dev library preview tests ---
 
 
diff --git a/tests/test_binding_inheritance.py b/tests/test_binding_inheritance.py
index 6e4c59b0f..6bb1728fa 100644
--- a/tests/test_binding_inheritance.py
+++ b/tests/test_binding_inheritance.py
@@ -39,7 +39,7 @@ class NoBindings(App[None]):
 async def test_just_app_no_bindings() -> None:
     """An app with no bindings should have no bindings, other than ctrl+c."""
     async with NoBindings().run_test() as pilot:
-        assert list(pilot.app._bindings.keys.keys()) == ["ctrl+c"]
+        assert list(pilot.app._bindings.keys.keys()) == ["ctrl+c", "ctrl+@"]
         assert pilot.app._bindings.get_key("ctrl+c").priority is True
 
 
@@ -60,7 +60,9 @@ class AlphaBinding(App[None]):
 async def test_just_app_alpha_binding() -> None:
     """An app with a single binding should have just the one binding."""
     async with AlphaBinding().run_test() as pilot:
-        assert sorted(pilot.app._bindings.keys.keys()) == sorted(["ctrl+c", "a"])
+        assert sorted(pilot.app._bindings.keys.keys()) == sorted(
+            ["ctrl+c", "ctrl+@", "a"]
+        )
         assert pilot.app._bindings.get_key("ctrl+c").priority is True
         assert pilot.app._bindings.get_key("a").priority is True
 
@@ -82,7 +84,9 @@ class LowAlphaBinding(App[None]):
 async def test_just_app_low_priority_alpha_binding() -> None:
     """An app with a single low-priority binding should have just the one binding."""
     async with LowAlphaBinding().run_test() as pilot:
-        assert sorted(pilot.app._bindings.keys.keys()) == sorted(["ctrl+c", "a"])
+        assert sorted(pilot.app._bindings.keys.keys()) == sorted(
+            ["ctrl+c", "ctrl+@", "a"]
+        )
         assert pilot.app._bindings.get_key("ctrl+c").priority is True
         assert pilot.app._bindings.get_key("a").priority is False
 
diff --git a/tests/test_fuzzy.py b/tests/test_fuzzy.py
index 71c073d9f..9b0e46cb0 100644
--- a/tests/test_fuzzy.py
+++ b/tests/test_fuzzy.py
@@ -1,3 +1,4 @@
+from rich.style import Style
 from rich.text import Span
 
 from textual._fuzzy import Matcher
@@ -28,13 +29,12 @@ def test_highlight():
     matcher = Matcher("foo.bar")
 
     spans = matcher.highlight("foo/egg.bar").spans
-    print(spans)
     assert spans == [
-        Span(0, 1, "bold"),
-        Span(1, 2, "bold"),
-        Span(2, 3, "bold"),
-        Span(7, 8, "bold"),
-        Span(8, 9, "bold"),
-        Span(9, 10, "bold"),
-        Span(10, 11, "bold"),
+        Span(0, 1, Style(reverse=True)),
+        Span(1, 2, Style(reverse=True)),
+        Span(2, 3, Style(reverse=True)),
+        Span(7, 8, Style(reverse=True)),
+        Span(8, 9, Style(reverse=True)),
+        Span(9, 10, Style(reverse=True)),
+        Span(10, 11, Style(reverse=True)),
     ]