# actorSystem The [`DistributedActorSystem`](/documentation/Distributed/DistributedActorSystem) that is managing this distributed actor. ``` nonisolated var actorSystem: Self.ActorSystem { get } ``` ## Discussion It is immutable and equal to the system assigned during the distributed actor’s local initializer (or to the system passed to the [`resolve(id:using:)`](/documentation/Distributed/DistributedActor/resolve(id:using:)) static function). ## Synthesized property In concrete distributed actor declarations, a witness for this protocol requirement is synthesized by the compiler. It is required to assign an initial value to the `actorSystem` property inside a distributed actor’s designated initializer. Semantically, it can be treated as a `let` declaration, that must be assigned in order to fully-initialize the instance. If a distributed actor declares no initializer, its default initializer will take the shape of `init(actorSystem:)`, and initialize this property using the passed [`DistributedActorSystem`](/documentation/Distributed/DistributedActorSystem). If any user-defined initializer exists, the default initializer is not synthesized, and all the user-defined initializers must take care to initialize this property. --- 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)