Mark Richard Hamill (/ˈhæməl/; born September 25, 1951) is an American actor and writer. He is known for his role as Luke Skywalker in the Star Wars film series, beginning with the original 1977 film and subsequently winning three Saturn Awards for his performances in The Empire Strikes Back (1980), Return of the Jedi (1983), and The Last Jedi (2017). His other film appearances include Corvette Summer (1978) and The Big Red One (1980). Hamill has also appeared on stage in several theater productions, primarily during the 1980s.

He is a prolific voice actor who has portrayed characters in numerous animated television series, films and video games. Hamill is known for his long-standing role as the Joker in various DC Comics projects, commencing with Batman: The Animated Series. He has also voiced the Hobgoblin in Spider-Man, Fire Lord Ozai in Avatar: The Last Airbender and Skips in Regular Show.