diff --git a/homeassistant/components/universal/media_player.py b/homeassistant/components/universal/media_player.py
index 75c2b5d0432..55adadad845 100644
--- a/homeassistant/components/universal/media_player.py
+++ b/homeassistant/components/universal/media_player.py
@@ -53,6 +53,7 @@ from homeassistant.const import (
     CONF_NAME,
     CONF_STATE,
     CONF_STATE_TEMPLATE,
+    CONF_UNIQUE_ID,
     EVENT_HOMEASSISTANT_START,
     SERVICE_MEDIA_NEXT_TRACK,
     SERVICE_MEDIA_PAUSE,
@@ -124,6 +125,7 @@ PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
         vol.Optional(CONF_ATTRS, default={}): vol.Or(
             cv.ensure_list(ATTRS_SCHEMA), ATTRS_SCHEMA
         ),
+        vol.Optional(CONF_UNIQUE_ID): cv.string,
         vol.Optional(CONF_DEVICE_CLASS): DEVICE_CLASSES_SCHEMA,
         vol.Optional(CONF_STATE_TEMPLATE): cv.template,
     },
@@ -146,6 +148,7 @@ async def async_setup_platform(
         config.get(CONF_CHILDREN),
         config.get(CONF_COMMANDS),
         config.get(CONF_ATTRS),
+        config.get(CONF_UNIQUE_ID),
         config.get(CONF_DEVICE_CLASS),
         config.get(CONF_STATE_TEMPLATE),
     )
@@ -165,6 +168,7 @@ class UniversalMediaPlayer(MediaPlayerEntity):
         children,
         commands,
         attributes,
+        unique_id=None,
         device_class=None,
         state_template=None,
     ):
@@ -183,6 +187,7 @@ class UniversalMediaPlayer(MediaPlayerEntity):
         self._state_template_result = None
         self._state_template = state_template
         self._device_class = device_class
+        self._attr_unique_id = unique_id
 
     async def async_added_to_hass(self) -> None:
         """Subscribe to children and template state changes."""
diff --git a/tests/components/universal/test_media_player.py b/tests/components/universal/test_media_player.py
index b589fc09a6a..059a19caf45 100644
--- a/tests/components/universal/test_media_player.py
+++ b/tests/components/universal/test_media_player.py
@@ -21,6 +21,7 @@ from homeassistant.const import (
     STATE_UNKNOWN,
 )
 from homeassistant.core import Context, callback
+from homeassistant.helpers import entity_registry
 from homeassistant.helpers.event import async_track_state_change_event
 from homeassistant.setup import async_setup_component
 
@@ -1092,6 +1093,26 @@ async def test_device_class(hass):
     assert hass.states.get("media_player.tv").attributes["device_class"] == "tv"
 
 
+async def test_unique_id(hass):
+    """Test unique_id property."""
+    hass.states.async_set("sensor.test_sensor", "on")
+
+    await async_setup_component(
+        hass,
+        "media_player",
+        {
+            "media_player": {
+                "platform": "universal",
+                "name": "tv",
+                "unique_id": "universal_master_bed_tv",
+            }
+        },
+    )
+    await hass.async_block_till_done()
+    er = entity_registry.async_get(hass)
+    assert er.async_get("media_player.tv").unique_id == "universal_master_bed_tv"
+
+
 async def test_invalid_state_template(hass):
     """Test invalid state template sets state to None."""
     hass.states.async_set("sensor.test_sensor", "on")
@@ -1220,3 +1241,4 @@ async def test_reload(hass):
     assert (
         "device_class" not in hass.states.get("media_player.master_bed_tv").attributes
     )
+    assert "unique_id" not in hass.states.get("media_player.master_bed_tv").attributes