Mark Hamill is an actor known for both his on-screen work and voice roles. He is best known for his portrayal of Luke Skywalker in George Lucas' Star Wars movies.
In more recent years, Hamill has expanded his resume with a variety of voice roles in cartoons and video games. He is widely recognized for his voice work as the Joker, a role he first played in Batman: The Animated Series. He reprised this role in Batman: Arkham Asylum and did so again in Batman: Arkham City. Although it was reported that Arkham City was to be his last turn as the character, he has since done additional voice work as the Joker for DC Universe Online.