Are controllers part of an actor system?

I’m new to play framework, my question is:
The code that runs on a controller, is called by an actor system or better by an actor?
Thank you

I am not sure if controller is or gets called by an actor, but I know some parts are part of the actor system, especially if you use the default Akka HTTP. Play’s default execution thread pool is an Akka dispatcher, and is used by the main actor system.