diff --git a/homeassistant/components/cast/media_player.py b/homeassistant/components/cast/media_player.py
index 3cb77c8f1857..3910dd04d42a 100644
--- a/homeassistant/components/cast/media_player.py
+++ b/homeassistant/components/cast/media_player.py
@@ -305,8 +305,11 @@ class CastDevice(MediaPlayerEntity):
             tts_base_url = None
             url_description = ""
             if "tts" in self.hass.config.components:
+                # pylint: disable=[import-outside-toplevel]
+                from homeassistant.components import tts
+
                 with suppress(KeyError):  # base_url not configured
-                    tts_base_url = self.hass.components.tts.get_base_url(self.hass)
+                    tts_base_url = tts.get_base_url(self.hass)
 
             with suppress(NoURLAvailableError):  # external_url not configured
                 external_url = get_url(self.hass, allow_internal=False)
diff --git a/homeassistant/components/tts/__init__.py b/homeassistant/components/tts/__init__.py
index 807390f89925..515dc25899ad 100644
--- a/homeassistant/components/tts/__init__.py
+++ b/homeassistant/components/tts/__init__.py
@@ -678,6 +678,6 @@ class TextToSpeechView(HomeAssistantView):
         return web.Response(body=data, content_type=content)
 
 
-def get_base_url(hass):
+def get_base_url(hass: HomeAssistant) -> str:
     """Get base URL."""
     return hass.data[BASE_URL_KEY] or get_url(hass)