Mark Hamill is an American actor, producer, director, and writer. He is best known for starring as Luke Skywalker in the original Star Wars trilogy, and as the voice of the Joker in Batman: The Animated Series.
In Scooby-Doo! Mystery Incorporated, Mark Hamill voices the Crybaby Clown while Matt Lanter voices Baylor Hotner. This is ironic as Hamill is best known for his role as Luke Skywalker in the original live-action trilogy film series while Lanter has portrayed Anakin Skywalker in the Star Wars: The Clone Wars CGI cartoon series.
