Peter Maximoff is a fictional character appearing in 20th Century Fox's X-Men film series, portrayed by Evan Peters and based on the Marvel Comics character Quicksilver, a mutant with the ability to move at superhuman speed. The character appeared in the films X-Men: Days of Future Past (2014), X-Men: Apocalypse (2016), and Dark Phoenix (2019), and had a cameo appearance in Deadpool 2 (2018).