"The clock is ticking!" — Joker in Galaxy Jest The Joker is Gotham's most notorious criminal and the archenemy of Batman. He is voiced by Mark Hamill. Trivia Joker is voiced by Mark Hamill, who previously voiced him in the DC Animated Universe, Batman: The Killing Joke, DC Universe Online, and the Batman: Arkham series. Retrieved from "https://justice-league-action.fandom.com/wiki/Joker?oldid=2171" Categories: Characters Villains Males Community content is available under CC-BY-SA unless otherwise noted.