In Matthew Vaughn's 'Kick-Ass' Aaron Johnson plays Dave Lizewski, a comic book fan who decides to become a superhero and fight crime by rebranding himself as Kick-Ass. He's soon joined by sidekick Red Mist (Christopher Mintz-Plasse), another high school geek with a thing for costumes. The duo talk to Harry Guerin about the movie and their respective roles.

Watch the interview.