diff --git a/src/client/actions/ThreadCreate.js b/src/client/actions/ThreadCreate.js
index f7c36e678720..d2d58599fb43 100644
--- a/src/client/actions/ThreadCreate.js
+++ b/src/client/actions/ThreadCreate.js
@@ -13,8 +13,9 @@ class ThreadCreateAction extends Action {
        * Emitted whenever a thread is created or when the client user is added to a thread.
        * @event Client#threadCreate
        * @param {ThreadChannel} thread The thread that was created
+       * @param {boolean} newlyCreated Whether the thread was newly created
        */
-      client.emit(Events.THREAD_CREATE, thread);
+      client.emit(Events.THREAD_CREATE, thread, data.newly_created ?? false);
     }
     return { thread };
   }
diff --git a/typings/index.d.ts b/typings/index.d.ts
index d634484aa9f0..59cc3166128c 100644
--- a/typings/index.d.ts
+++ b/typings/index.d.ts
@@ -3969,7 +3969,7 @@ export interface ClientEvents extends BaseClientEvents {
   roleCreate: [role: Role];
   roleDelete: [role: Role];
   roleUpdate: [oldRole: Role, newRole: Role];
-  threadCreate: [thread: ThreadChannel];
+  threadCreate: [thread: ThreadChannel, newlyCreated: boolean];
   threadDelete: [thread: ThreadChannel];
   threadListSync: [threads: Collection<Snowflake, ThreadChannel>];
   threadMemberUpdate: [oldMember: ThreadMember, newMember: ThreadMember];