diff --git a/litecord/gateway/websocket.py b/litecord/gateway/websocket.py
index a2e037e..d9b70a1 100644
--- a/litecord/gateway/websocket.py
+++ b/litecord/gateway/websocket.py
@@ -69,6 +69,29 @@ WebsocketProperties = collections.namedtuple(
 )
 
 
+def _complete_users_list(base_ready, user_ready) -> dict:
+    """Use the data we were already preparing to send in READY to construct
+    the users array, saving on I/O cost."""
+
+    # TODO deduplication
+    users_list = []
+
+    for guild in base_ready["guilds"]:
+        if guild["unavailable"]:
+            continue
+
+        for member in guild["members"]:
+            users_list.append(member["user"])
+
+    for private_channel in base_ready["private_channels"]:
+        for recipient in private_channel["recipients"]:
+            users_list.append(recipient)
+
+    ready = {**base_ready, **user_ready}
+    ready["users"] = users_list
+    return ready
+
+
 class GatewayWebsocket:
     """Main gateway websocket logic."""
 
@@ -378,7 +401,8 @@ class GatewayWebsocket:
             "shard": [self.state.current_shard, self.state.shard_count],
         }
 
-        await self.dispatch("READY", {**base_ready, **user_ready})
+        full_ready_data = _complete_users_list(base_ready, user_ready)
+        await self.dispatch("READY", full_ready_data)
         app.sched.spawn(self._guild_dispatch(guilds))
 
     async def _check_shards(self, shard, user_id):