Dave Lizewski is an unnoticed high school student and comic book fan who one day decides to become a super-hero, even though he has no powers, training or meaningful reason to do so.
- Aaron Taylor-JohnsonDave Lizewski / Kick-Ass
- Chloë Grace MoretzMindy Macready / Hit-Girl
- Christopher Mintz-PlasseChris D'Amico / Red Mist
- Nicolas CageDamon Macready / Big Daddy
- Mark StrongFrank D'Amico
- Clark DukeMarty