Boy Kills World is a 2023 dystopian action comedy film starring Bill Skarsgård. Directed by Moritz Mohr, in his feature directorial debut, the film's supporting cast includes Jessica Rothe, Michelle Dockery, Brett Gelman, Isaiah Mustafa, Yayan Ruhian, Andrew Koji, Sharlto Copley, with Famke Janssen, and features the voice of H. Jon Benjamin. The plot revolves around a campaign of vengeance enacted by a martial arts expert, rendered deaf-mute by an attack that killed his entire family, whose thoughts are presented as an inner voice derived from a childhood video game.