 | Aaron Taylor-Johnson als Dave Lizewski / Kick-Ass |
 | Chloë Grace Moretz als Mindy Macready / Hit-Girl |
 | Nicolas Cage als Damon Macready / Big Daddy |
 | Lyndsy Fonseca als Katie Deauxma |
 | Mark Strong als Frank D'Amico |
 | Deborah Twiss als Mrs. Zane |
 | Christopher Mintz-Plasse als Chris D'Amico / Red Mist |
 | Elizabeth McGovern als Mrs. Lizewski |
 | Omari Hardwick als Marcus |
 | Xander Berkeley als Detective Vic Gigante |
 | Garrett M. Brown als Mr. Lizewski |
 | Clark Duke als Marty |
 | Evan Peters als Todd |
 | Sophie Wu als Erika Cho |
 | Stu 'Large' Riley als Huge Goon |
 | Michael Rispoli als Big Joe |
 | Corey Johnson als Sporty Goon |
 | Kenneth Simmons als Scary Goon |
 | Anthony Desio als Baby Goon |
 | Randall Batinkoff als Tre Fernandez |
 | Dexter Fletcher als Cody |
 | Yancy Butler als Angie D'Amico |
 | Craig Ferguson als Himself |
 | Jason Flemyng als Lobby Goon |
 | Adrian Martinez als Ginger Goon |
 | Joe Bacino als Posh Goon |
 | Johnny Hopkins als 1st Gang Kid |
 | Ohene Cornelius als 2nd Gang Kid |
| Carlos Besse Peres als Buttons |
 | Russell Bentley als Medic |
 | Tamer Hassan als Matthew |
 | Tim Plester als Danil |
 | Hubert Boorder als Oscar Juarez |
| Christopher McGuire als Diner Fight Guy #1 |
| Max White als Diner Fight Guy #2 |
| Dean Copkov als Diner Fight Guy #3 |
| Jacob Cartwright als Running Teenager |
| Maurice DuBois als News Anchor |
 | Dana Tyler als News Anchor |
| Omar A. Soriano als Leroy |
| Katrena Rochell als Female Junkie |
 | Kofi Natei als Rasul |
 | Dan Duran als Reporter |
| Louis Young als Breaking News Reporter |
| Val Jobara als Nervous Goon |
| Quinn Smith als Big Mean Boy |
| Kirk Tingblad als Audience Member |
| Peter Bartfay als Comic Store Customer (uncredited) |
 | Jason Salkey als 1st Cop (uncredited) |
 | Daphne Cheung als Siew Ling (uncredited) |
 | Russell De Rozario als Man in Elevator (uncredited) |
 | Annie Cooper als Jess (uncredited) |
 | Adam Blampied als Kid in Comic Book Store (uncredited) |
| Wayne Curnew als Bartender (uncredited) |
| Tangara Jones als Gang Girl (uncredited) |
 | Rab Affleck als Moustache Goon (uncredited) |
 | Alexander Hathaway als Comic Book Store Manager (uncredited) |
 | Ashleigh Hubbard als Blonde |
| Walle Jobara als Goon |
| Matthew Vaughn | Screenplay |
| Jane Goldman | Screenplay |
| Brad Pitt | Producer |
| Pietro Scalia | Editor |
| Kris Thykier | Producer |
| Matthew Vaughn | Director |
| Adam Bohling | Producer |
| John Romita Jr. | Comic Book |
| Marius de Vries | Original Music Composer |
| John Murphy | Original Music Composer |
| Henry Jackman | Original Music Composer |
| Ilan Eshkeri | Original Music Composer |
| Mark Millar | Comic Book |
| Ian Neil | Music Supervisor |
| Simon Hayes | Production Sound Mixer |
| Doug Cooper | Sound Re-Recording Mixer |
| Annie Penn | Script Supervisor |
| Jeremy Kleiner | Executive Producer |
| Mark Millar | Executive Producer |
| Matthew Vaughn | Producer |
| Nicole Young | Costume Supervisor |
| John Romita Jr. | Executive Producer |
| Eddie Hamilton | Editor |
| Ben Davis | Director of Photography |
| Andy Richards | Music Editor |
| Sam Renton | First Assistant Camera |
| Chris Burdon | Sound Re-Recording Mixer |
| Jo Gross | Production Coordinator |
| Stephen Marks | Executive Producer |
| Sammy Sheldon | Costume Design |
| Daniel Smith | Still Photographer |
| Russell De Rozario | Production Design |
| Sarah Halley Finn | Casting |
| Lucinda Syson | Casting |
| Danny Sheehan | Supervising Sound Editor |
| Pierre Lagrange | Executive Producer |
| Dean O'Toole | Unit Production Manager |
| Jane Goldman | Co-Producer |
| Jon Harris | Editor |
| Christoph Bauschinger | Music Editor |
| Tamsin Jeffrey | First Assistant Editor |
| Ian Thomas | Musician |
| Stephen McLaughlin | Music Producer |
| Stephen McLaughlin | Scoring Mixer |
| Liam Howlett | Additional Music |
| Joe Howard | Art Direction |
| Gavin Rose | ADR Editor |
| Gavin Rose | Dialogue Editor |
| Fae Hammond | Makeup Designer |
| Fae Hammond | Hair Designer |
| Tarquin Pack | Producer |
| David Reid | Producer |
| Tim Maurice-Jones | Second Unit Director |
| Mattias Lindahl | Visual Effects Supervisor |
| Andy Taylor | Visual Effects Producer |
| John King | Supervising Art Director |
| Tina Jones | Set Decoration |
| Kevin Fraser | Key Grip |
| Darren Holland | Grip |
| David Smith | Gaffer |
| Andrew Watson | Rigging Gaffer |
| Sarah Stuart | Art Direction |
| Ilona Herman | Makeup Artist |
| Ilona Herman | Hairstylist |
| Karen Sherriff-Brown | Makeup & Hair |
| Allen J. Polley | Property Master |
| Mark Appleby | ADR Mixer |
| Ron Bedrosian | ADR Mixer |
| Louis Elman | ADR Voice Casting |
| Abigail Barbier | ADR Voice Casting |
| Arthur Graley | Foley Editor |
| Peter Burgis | Foley Artist |
| Jason Swanscott | Foley Artist |
| Michael Maroussas | Sound Designer |
| Rob Prynne | Sound Designer |
| Bradley James Allan | Stunt Coordinator |
| Demetri Jagger | Video Assist Operator |
| Dominic Thomson | Digital Intermediate Editor |
| Todd Kleparski | Digital Intermediate Producer |
| Asa Shoul | Digital Intermediate Colorist |
| Matt Curtis | Title Designer |
