Mark Hamill (b. 1951) is an actor who gained fame for his portrayal of Luke Skywalker in the original Star Wars trilogy. In recent years, he has become a successful voice actor, most notably voicing the character of the Joker in various incarnations of Batman and related DC Comics productions. In 1980, shortly before the release of The Empire Strikes Back, Hamill guest starred on The Muppet Show episode 417, appearing as both himself and Luke Skywalker.
In a 2003 online chat with The Milwaukee Journal Sentinel, Hamill spoke of his interest in The Muppets and friendship with performer Richard Hunt
Hamill's other credits include stage work (such as a stint as the lead in Broadway's Amadeus), the 1995 film remake of Village of the Damned (with Christopher Reeve), guest spots on The Bill Cosby Show and both live-action series of The Flash (as villain The Trickster), and voice-overs, often as himself, on The Simpsons, Robot Chicken, Freakazoid and other series.