diff --git a/src/textual/widgets/_selection_list.py b/src/textual/widgets/_selection_list.py
index f0e4e37b0..ea1e8e927 100644
--- a/src/textual/widgets/_selection_list.py
+++ b/src/textual/widgets/_selection_list.py
@@ -331,6 +331,10 @@ class SelectionList(Generic[SelectionType], OptionList):
         self.refresh()
         return self
 
+    def toggle_all(self) -> Self:
+        """Toggle all items."""
+        return self._apply_to_all(self._toggle)
+
     def _make_selection(
         self,
         selection: tuple[TextType, SelectionType]