diff --git a/homeassistant/components/google_assistant/trait.py b/homeassistant/components/google_assistant/trait.py
index 5d2d59f2144..653324758e0 100644
--- a/homeassistant/components/google_assistant/trait.py
+++ b/homeassistant/components/google_assistant/trait.py
@@ -29,6 +29,7 @@ from homeassistant.const import (
     ATTR_ENTITY_ID,
     ATTR_SUPPORTED_FEATURES,
     ATTR_TEMPERATURE,
+    CAST_APP_ID_HOMEASSISTANT,
     SERVICE_ALARM_ARM_AWAY,
     SERVICE_ALARM_ARM_CUSTOM_BYPASS,
     SERVICE_ALARM_ARM_HOME,
@@ -287,7 +288,10 @@ class CameraStreamTrait(_Trait):
         url = await self.hass.components.camera.async_request_stream(
             self.state.entity_id, "hls"
         )
-        self.stream_info = {"cameraStreamAccessUrl": f"{get_url(self.hass)}{url}"}
+        self.stream_info = {
+            "cameraStreamAccessUrl": f"{get_url(self.hass)}{url}",
+            "cameraStreamReceiverAppId": CAST_APP_ID_HOMEASSISTANT,
+        }
 
 
 @register_trait
diff --git a/homeassistant/const.py b/homeassistant/const.py
index 7e695cb28ab..cd093b4e9fa 100644
--- a/homeassistant/const.py
+++ b/homeassistant/const.py
@@ -608,3 +608,6 @@ PRECISION_TENTHS = 0.1
 # Static list of entities that will never be exposed to
 # cloud, alexa, or google_home components
 CLOUD_NEVER_EXPOSED_ENTITIES = ["group.all_locks"]
+
+# The ID of the Home Assistant Cast App
+CAST_APP_ID_HOMEASSISTANT = "B12CE3CA"
diff --git a/tests/components/google_assistant/test_smart_home.py b/tests/components/google_assistant/test_smart_home.py
index 78d403c2038..f35415ee9e4 100644
--- a/tests/components/google_assistant/test_smart_home.py
+++ b/tests/components/google_assistant/test_smart_home.py
@@ -976,6 +976,7 @@ async def test_trait_execute_adding_query_data(hass):
                     "states": {
                         "online": True,
                         "cameraStreamAccessUrl": "https://example.com/api/streams/bla",
+                        "cameraStreamReceiverAppId": "B12CE3CA",
                     },
                 }
             ]
diff --git a/tests/components/google_assistant/test_trait.py b/tests/components/google_assistant/test_trait.py
index ac0db986f42..d415c4f2476 100644
--- a/tests/components/google_assistant/test_trait.py
+++ b/tests/components/google_assistant/test_trait.py
@@ -135,7 +135,8 @@ async def test_camera_stream(hass):
         await trt.execute(trait.COMMAND_GET_CAMERA_STREAM, BASIC_DATA, {}, {})
 
     assert trt.query_attributes() == {
-        "cameraStreamAccessUrl": "https://example.com/api/streams/bla"
+        "cameraStreamAccessUrl": "https://example.com/api/streams/bla",
+        "cameraStreamReceiverAppId": "B12CE3CA",
     }