diff --git a/src/app_model/_app.py b/src/app_model/_app.py
index 65507eb..8df3e7a 100644
--- a/src/app_model/_app.py
+++ b/src/app_model/_app.py
@@ -4,6 +4,7 @@
 import os
 import sys
 from collections.abc import Iterable, MutableMapping
+from types import MappingProxyType
 from typing import (
     TYPE_CHECKING,
     ClassVar,
@@ -126,6 +127,7 @@ def __init__(
 
         self.injection_store.on_unannotated_required_args = "ignore"
 
+        self._registered_actions: dict[str, Action] = {}
         self._disposers: list[tuple[str, DisposeCallable]] = []
 
     @property
@@ -291,3 +293,42 @@ def _dispose() -> None:
                 d.pop()()
 
         return _dispose
+
+    @property
+    def registered_actions(self) -> MappingProxyType[str, Action]:
+        """Return a Mapping of id->Action object for all registered actions.
+
+        Note that this only includes actions that were registered using
+        `register_action`.  Commands registered directly via
+        `Application.commands.register_action` will not be included in this mapping.
+        """
+        return MappingProxyType(self._registered_actions)
+
+    def _register_action_obj(self, action: Action) -> DisposeCallable:
+        """Register an Action object. Return a function that unregisters the action.
+
+        Helper for `register_action()`.
+        """
+        # register commands
+        disposers = [self.commands.register_action(action)]
+        # register menus
+        if dm := self.menus.append_action_menus(action):
+            disposers.append(dm)
+        # register keybindings
+        if dk := self.keybindings.register_action_keybindings(action):
+            disposers.append(dk)
+
+        # remember the action object as a whole.
+        # note that commands.register_action will have raised an exception
+        # if the action.id is already registered, so we can assume that
+        # the keys are unique.
+        self._registered_actions[action.id] = action
+
+        # create a function that will dispose of all the disposers
+        def _dispose() -> None:
+            self._registered_actions.pop(action.id, None)
+            for d in disposers:
+                d()
+
+        self._disposers.append((action.id, _dispose))
+        return _dispose
diff --git a/src/app_model/registries/_register.py b/src/app_model/registries/_register.py
index 1712d14..6186495 100644
--- a/src/app_model/registries/_register.py
+++ b/src/app_model/registries/_register.py
@@ -269,19 +269,4 @@ def _register_action_obj(app: Application | str, action: Action) -> DisposeCalla
     from app_model._app import Application
 
     app = app if isinstance(app, Application) else Application.get_or_create(app)
-
-    # commands
-    disposers = [app.commands.register_action(action)]
-    # menus
-    if dm := app.menus.append_action_menus(action):
-        disposers.append(dm)
-    # keybindings
-    if dk := app.keybindings.register_action_keybindings(action):
-        disposers.append(dk)
-
-    def _dispose() -> None:
-        for d in disposers:
-            d()
-
-    app._disposers.append((action.id, _dispose))
-    return _dispose
+    return app._register_action_obj(action)
diff --git a/src/app_model/types/__init__.py b/src/app_model/types/__init__.py
index 39a6530..72acf38 100644
--- a/src/app_model/types/__init__.py
+++ b/src/app_model/types/__init__.py
@@ -19,7 +19,9 @@
 from ._menu_rule import MenuItem, MenuItemBase, MenuRule, SubmenuItem
 
 if TYPE_CHECKING:
-    from typing import Callable, TypeAlias
+    from typing import Callable
+
+    from typing_extensions import TypeAlias
 
     from ._icon import IconOrDict as IconOrDict
     from ._keybinding_rule import KeyBindingRuleDict as KeyBindingRuleDict
diff --git a/tests/test_app.py b/tests/test_app.py
index 61d7940..8f43cfb 100644
--- a/tests/test_app.py
+++ b/tests/test_app.py
@@ -8,6 +8,8 @@
 
 from app_model import Application
 from app_model.expressions import Context
+from app_model.types import Action
+from app_model.types._menu_rule import MenuRule
 
 if TYPE_CHECKING:
     from conftest import FullApp
@@ -115,3 +117,18 @@ def test_app_context() -> None:
 
     with pytest.raises(TypeError, match="context must be a Context or MutableMapping"):
         Application("app4", context=1)  # type: ignore[arg-type]
+
+
+def test_register_actions() -> None:
+    app = Application("app5")
+    actions = app.registered_actions
+    assert not actions
+    dispose = app.register_action(
+        "my_action", title="My Action", callback=lambda: None, menus=["Window"]
+    )
+    assert "my_action" in actions
+    assert isinstance(action := actions["my_action"], Action)
+    assert action.menus == [MenuRule(id="Window")]
+    dispose()
+    assert "my_action" not in actions
+    assert not actions