diff --git a/docs/en/docs/release-notes.md b/docs/en/docs/release-notes.md
index fb404fcbda..0abdfe6f28 100644
--- a/docs/en/docs/release-notes.md
+++ b/docs/en/docs/release-notes.md
@@ -7,6 +7,12 @@ hide:
 
 ## Latest Changes
 
+### Fixes
+
+* 🐛 Fix `on_startup` and `on_shutdown` parameters of `APIRouter`. PR [#14873](https://github.com/fastapi/fastapi/pull/14873) by [@YuriiMotov](https://github.com/YuriiMotov).
+
+## 0.128.6
+
 ### Translations
 
 * 🌐 Update translations for zh (update-outdated). PR [#14843](https://github.com/fastapi/fastapi/pull/14843) by [@tiangolo](https://github.com/tiangolo).
diff --git a/fastapi/__init__.py b/fastapi/__init__.py
index 1176856891..95e57e2eba 100644
--- a/fastapi/__init__.py
+++ b/fastapi/__init__.py
@@ -1,6 +1,6 @@
 """FastAPI framework, high performance, easy to learn, fast to code, ready for production"""
 
-__version__ = "0.128.5"
+__version__ = "0.128.6"
 
 from starlette import status as status
 
diff --git a/fastapi/routing.py b/fastapi/routing.py
index 0b4d28873c..16a89ef3e3 100644
--- a/fastapi/routing.py
+++ b/fastapi/routing.py
@@ -952,16 +952,6 @@ class APIRouter(routing.Router):
             ),
         ] = Default(generate_unique_id),
     ) -> None:
-        # Handle on_startup/on_shutdown locally since Starlette removed support
-        # Ref: https://github.com/Kludex/starlette/pull/3117
-        # TODO: deprecate this once the lifespan (or alternative) interface is improved
-        self.on_startup: list[Callable[[], Any]] = (
-            [] if on_startup is None else list(on_startup)
-        )
-        self.on_shutdown: list[Callable[[], Any]] = (
-            [] if on_shutdown is None else list(on_shutdown)
-        )
-
         # Determine the lifespan context to use
         if lifespan is None:
             # Use the default lifespan that runs on_startup/on_shutdown handlers
@@ -985,6 +975,17 @@ class APIRouter(routing.Router):
             assert not prefix.endswith("/"), (
                 "A path prefix must not end with '/', as the routes will start with '/'"
             )
+
+        # Handle on_startup/on_shutdown locally since Starlette removed support
+        # Ref: https://github.com/Kludex/starlette/pull/3117
+        # TODO: deprecate this once the lifespan (or alternative) interface is improved
+        self.on_startup: list[Callable[[], Any]] = (
+            [] if on_startup is None else list(on_startup)
+        )
+        self.on_shutdown: list[Callable[[], Any]] = (
+            [] if on_shutdown is None else list(on_shutdown)
+        )
+
         self.prefix = prefix
         self.tags: list[Union[str, Enum]] = tags or []
         self.dependencies = list(dependencies or [])
diff --git a/tests/test_router_events.py b/tests/test_router_events.py
index 65f2f521c1..a47d119139 100644
--- a/tests/test_router_events.py
+++ b/tests/test_router_events.py
@@ -317,3 +317,63 @@ def test_router_async_generator_lifespan(state: State) -> None:
         assert response.json() == {"message": "Hello World"}
     assert state.app_startup is True
     assert state.app_shutdown is True
+
+
+def test_startup_shutdown_handlers_as_parameters(state: State) -> None:
+    """Test that startup/shutdown handlers passed as parameters to FastAPI are called correctly."""
+
+    def app_startup() -> None:
+        state.app_startup = True
+
+    def app_shutdown() -> None:
+        state.app_shutdown = True
+
+    app = FastAPI(on_startup=[app_startup], on_shutdown=[app_shutdown])
+
+    @app.get("/")
+    def main() -> dict[str, str]:
+        return {"message": "Hello World"}
+
+    def router_startup() -> None:
+        state.router_startup = True
+
+    def router_shutdown() -> None:
+        state.router_shutdown = True
+
+    router = APIRouter(on_startup=[router_startup], on_shutdown=[router_shutdown])
+
+    def sub_router_startup() -> None:
+        state.sub_router_startup = True
+
+    def sub_router_shutdown() -> None:
+        state.sub_router_shutdown = True
+
+    sub_router = APIRouter(
+        on_startup=[sub_router_startup], on_shutdown=[sub_router_shutdown]
+    )
+
+    router.include_router(sub_router)
+    app.include_router(router)
+
+    assert state.app_startup is False
+    assert state.router_startup is False
+    assert state.sub_router_startup is False
+    assert state.app_shutdown is False
+    assert state.router_shutdown is False
+    assert state.sub_router_shutdown is False
+    with TestClient(app) as client:
+        assert state.app_startup is True
+        assert state.router_startup is True
+        assert state.sub_router_startup is True
+        assert state.app_shutdown is False
+        assert state.router_shutdown is False
+        assert state.sub_router_shutdown is False
+        response = client.get("/")
+        assert response.status_code == 200, response.text
+        assert response.json() == {"message": "Hello World"}
+    assert state.app_startup is True
+    assert state.router_startup is True
+    assert state.sub_router_startup is True
+    assert state.app_shutdown is True
+    assert state.router_shutdown is True
+    assert state.sub_router_shutdown is True