In the television show "Lazy Town", who is the actor of Robbie Rotten?

The actor who played Robbie Rotten in the television show "LazyTown" is Stefán Stefánsson. Stefánsson portrayed the villainous character with great comedic timing and brought his unique and memorable personality to life on screen. His portrayal of Robbie Rotten was loved by fans of the show and became one of his most iconic roles.