Vo filme Kick-Ass hrajú Aaron Taylor-Johnson (Dave Lizewski / Kick-Ass), Chloë Grace Moretz (Mindy Macready / Hit Girl), Nicolas Cage (Damon Macready / Big Daddy), Lyndsy Fonseca (Katie Deauxma), Mark Strong (Frank D'Amico), Deborah Twiss (Mrs. Zane), Christopher Mintz-Plasse (Chris D'Amico / Red Mist), Elizabeth McGovern (Mrs. Lizewski), Omari Hardwick (Sergeant Marcus Williams), Xander Berkeley (Detective Gigante), Garrett M. Brown (Mr. Lizewski), Clark Duke (Marty), Evan Peters (Todd), Sophie Wu (Erika Cho), Stu 'Large' Riley (Huge Goon), Michael Rispoli (Big Joe), Corey Johnson (Sporty Goon), Kenneth Simmons (Scary Goon), Anthony Desio (Baby Goon), Randall Batinkoff (Tre Fernandez), Dexter Fletcher (Cody), Yancy Butler (Angie D'Amico), Craig Ferguson (Craig Ferguson), Jason Flemyng (Lobby Goon), Adrian Martinez (Ginger Goon), Joe Bacino (Posh Goon), Johnny Hopkins (1st Gang Kid), Ohene Cornelius (2nd Gang Kid), Carlos Besse Peres (Buttons), Russell Bentley (Medic), Tamer Hassan (Matthew), Tim Plester (Danil), Hubert Boorder (Oscar Juarez), Christopher McGuire (Diner Fight Guy #1), Max White (Diner Fight Guy #2), Dean Copkov (Diner Fight Guy #3), Jacob Cartwright (Running Teenager), Maurice DuBois (News Anchor), Dana Tyler (News Anchor), Omar A. Soriano (Leroy), Katrena Rochell (Female Junkie), Kofi Natei (Rasul), Dan Duran (Reporter), Louis Young (Breaking News Reporter), Val Jobara (Nervous Goon), Quinn Smith (Big Mean Boy), Kirk Tingblad (Audience Member (uncredited)), Peter Bartfay (Comic Store Customer (uncredited)), Jason Salkey (1st Cop (uncredited)), Daphne Cheung (Siew Ling (uncredited)), Russell De Rozario (Man in Elevator (uncredited)), Annie Cooper (Jess (uncredited)), Adam Blampied (Kid in Comic Book Store (uncredited)), Wayne Curnew (Bartender (uncredited)), Tangara Jones (Gang Girl (uncredited)), Rab Affleck (Moustache Goon (uncredited)), Alexander Hathaway (Comic Book Store Manager (uncredited)).