diff --git a/homeassistant/components/sonos/__init__.py b/homeassistant/components/sonos/__init__.py
index 033c6e046c8..b4be0966ada 100644
--- a/homeassistant/components/sonos/__init__.py
+++ b/homeassistant/components/sonos/__init__.py
@@ -96,6 +96,7 @@ class SonosData:
         self.discovery_known: set[str] = set()
         self.boot_counts: dict[str, int] = {}
         self.mdns_names: dict[str, str] = {}
+        self.entity_id_mappings: dict[str, SonosSpeaker] = {}
 
 
 async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
diff --git a/homeassistant/components/sonos/entity.py b/homeassistant/components/sonos/entity.py
index 65f73eaf3f0..74d310d40ec 100644
--- a/homeassistant/components/sonos/entity.py
+++ b/homeassistant/components/sonos/entity.py
@@ -14,6 +14,7 @@ from homeassistant.helpers.dispatcher import async_dispatcher_connect
 from homeassistant.helpers.entity import DeviceInfo, Entity
 
 from .const import (
+    DATA_SONOS,
     DOMAIN,
     SONOS_FAVORITES_UPDATED,
     SONOS_POLL_UPDATE,
@@ -35,6 +36,7 @@ class SonosEntity(Entity):
 
     async def async_added_to_hass(self) -> None:
         """Handle common setup when added to hass."""
+        self.hass.data[DATA_SONOS].entity_id_mappings[self.entity_id] = self.speaker
         self.async_on_remove(
             async_dispatcher_connect(
                 self.hass,
@@ -57,6 +59,10 @@ class SonosEntity(Entity):
             )
         )
 
+    async def async_will_remove_from_hass(self) -> None:
+        """Clean up when entity is removed."""
+        del self.hass.data[DATA_SONOS].entity_id_mappings[self.entity_id]
+
     async def async_poll(self, now: datetime.datetime) -> None:
         """Poll the entity if subscriptions fail."""
         if not self.speaker.subscriptions_failed:
diff --git a/homeassistant/components/sonos/media_player.py b/homeassistant/components/sonos/media_player.py
index f4dbf8f87d0..f4ce46dd5f5 100644
--- a/homeassistant/components/sonos/media_player.py
+++ b/homeassistant/components/sonos/media_player.py
@@ -28,6 +28,7 @@ from homeassistant.components.media_player.const import (
     REPEAT_MODE_ONE,
     SUPPORT_BROWSE_MEDIA,
     SUPPORT_CLEAR_PLAYLIST,
+    SUPPORT_GROUPING,
     SUPPORT_NEXT_TRACK,
     SUPPORT_PAUSE,
     SUPPORT_PLAY,
@@ -47,6 +48,7 @@ from homeassistant.components.plex.services import play_on_sonos
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import ATTR_TIME, STATE_IDLE, STATE_PAUSED, STATE_PLAYING
 from homeassistant.core import HomeAssistant, ServiceCall, callback
+from homeassistant.exceptions import HomeAssistantError
 from homeassistant.helpers import config_validation as cv, entity_platform, service
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
@@ -73,6 +75,7 @@ _LOGGER = logging.getLogger(__name__)
 SUPPORT_SONOS = (
     SUPPORT_BROWSE_MEDIA
     | SUPPORT_CLEAR_PLAYLIST
+    | SUPPORT_GROUPING
     | SUPPORT_NEXT_TRACK
     | SUPPORT_PAUSE
     | SUPPORT_PLAY
@@ -666,3 +669,18 @@ class SonosMediaPlayerEntity(SonosEntity, MediaPlayerEntity):
                 f"Media not found: {media_content_type} / {media_content_id}"
             )
         return response
+
+    def join_players(self, group_members):
+        """Join `group_members` as a player group with the current player."""
+        speakers = []
+        for entity_id in group_members:
+            if speaker := self.hass.data[DATA_SONOS].entity_id_mappings.get(entity_id):
+                speakers.append(speaker)
+            else:
+                raise HomeAssistantError(f"Not a known Sonos entity_id: {entity_id}")
+
+        self.speaker.join(speakers)
+
+    def unjoin_player(self):
+        """Remove this player from any group."""
+        self.speaker.unjoin()