# actorReady(_:) Invoked during a distributed actor’s initialization, as soon as it becomes fully initialized. ``` func actorReady(_ actor: Act) where Act : DistributedActor, Self.ActorID == Act.ID ``` ## Parameters `actor` reference to the (local) actor that was just fully initialized. ## Discussion The system is expected to store the reference to this actor, and maintain an `ActorID: DistributedActor` mapping for the purpose of implementing the `resolve(id:as:)` method. The system usually should NOT retain the passed reference, and it will be informed via [`resignID(_:)`](/documentation/Distributed/DistributedActorSystem/resignID(_:)) when the actor has been deallocated so it can remove the stale reference from its internal `ActorID: DistributedActor` mapping. The [`id`](/documentation/Distributed/DistributedActor/id) of the passed actor must be an [`ActorID`](/documentation/Distributed/DistributedActorSystem/ActorID) that this system previously has assigned. If `actorReady` gets called with some unknown ID, it should crash immediately as it signifies some very unexpected use of the system. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)