Kick-Ass is a media franchise based on the adventures of superheroes of the same name, created by Mark Millar and John Romita Jr. Set in the Millarworld, it began in 2008 with Marvel's Kick-Ass – The Dave Lizewski Years, followed by the anthology Millarworld Annual from 2016 to 2017, two stand-alone sequel series, Kick-Ass – The New Girl and Hit-Girl, from 2018 to 2020, and two crossover series, Kick-Ass vs. Hit-Girl and Big Game, in 2020 and 2023. In the series, Hit-Girl is a young vigilante going around the world stopping crime in violent ways, while Kick-Ass has had three people take the mantle, a hero, a sidekick, and a villain.