Batman: The Killing Joke is a 2016 American adult animated superhero film produced by Warner Bros. Animation and distributed by Warner Bros. Pictures. Featuring the DC Comics character Batman, the film is the 27th of the DC Universe Animated Original Movies, based on the graphic novel of the same name by Alan Moore and Brian Bolland. The film is directed by Sam Liu, written by Brian Azzarello and stars the voices of Kevin Conroy, Mark Hamill, Tara Strong, and Ray Wise. Like the novel, the film follows the Joker, Batman's arch-nemesis, and his efforts to drive police commissioner James Gordon insane as Batman works desperately to stop him.

Brian Azzarello is an American comic book writer and screenwriter who first came to prominence with the hardboiled crime series 100 Bullets, published by DC Comics' mature-audience imprint Vertigo. Azzarello is best known for his numerous collaborations with artists Eduardo Risso and Lee Bermejo, his contributions to the Watchmen prequel project Before Watchmen and The Dark Knight Returns sequel series DK III: The Master Race, as well as for his stints on the long-running Vertigo series Hellblazer and The New 52 relaunch of the Wonder Woman title.