Premise: Mark Richard Hamill ( born September 25 , 1951 ) is an American actor , voice actor , producer and writer . He is best known for playing Luke Skywalker in the Star Wars film series . Hamill is a prolific voice actor who has voiced characters in many animated television shows , movies , and video games since the 1970s . He is known for his long-standing role as DC Comics ' the Joker , commencing with Batman : The Animated Series in 1992 .
Hypothesis: Mark Hamill has voiced many characters.
Label: ENTAILMENT