Kick Ass.

Mark Millar was the executive producer. He had previous produced Wanted but in this film he got more involved in the post-production work like casting, drafting the script, costume, sets and location. He was also involved during filming, which took 14 weeks, 14 hours a day. The film was based on the Marvel Comic, Kick-Ass, which was written by Mark Millar. Millar started writting the comics in 2008 but the last comic of the series came out just before the film came out.

There were some problems with script, Mark Millar and Matthew Vaughan, the director, disagreed on the way it should end. Matthew Vaughan wanted to have a happy ending where the boy gets the girl, however Mark Millar had written a different ending for the comic where the boy doesn't get the girl. Another problem they had was they couldn't even afford a C-grade Marvel comic character so they had to release the film around the same time the last comic was released. Matthew Vaughan had a huge problem in finding people to finance his film because it was about a C-grade Marvel character, so he decided to raise the $30 million that was needed himself.

Matthew Vaughan said "I think that the British Film Industry has the potential to be the biggest and best film industry because we have the best actors, directors,studios and production crew the only thing we don't have is the money. We should stop being service providers" He says that British directors tend to make arthouse films because they have failed to make it big in Hollywood. He thinks that if "greedy" directors and actors didn't ask for large amounts of money up front and took a smaller salary it would give the industry a chance to grow.

Matthew Vaughan saved money in production by shooting in London rather than having to deal with the difficulties of transporting sets etc to Manhattan, where the film is set. They did a lot of the action scenes in Estree Studios with large green screens, high-resolution images of Manhattan was then added later using Media Composer program. The SpectraMatte feature can adjust details to make the backdrop look very realistic. Matthew Vaughan wanted to get high quality recordings of the original production sound so the actors didn't have to re-create the emotion later. He used multiple radio and boom mics, the audio was then imported onto Pro Tools program and edited.

The film was rated a 15 which may not have helped the box office sales because the target audience was meant to be young teenage boys who are into the superhero genre. However, Matthew Vaughan was not surprised at the rating and had ignored suggestions from Sony, the distributors, to tone down the language.

There was a lot controversy surrounding the film, some objected to the 11-year old girl using strong lanuage, also the strong theme of violence throughout the film. However, this did not effect the success of the film as much as it could have. Usually protests against that kind of thing would boost sales because it promotes awareness of the film and people want to see what the fuss is about for themselves. However, the main controversy talks came from the filmmakers themselves in a bid to increase promotion, and no large scale organisations made publicized protests so the controversy didn't really effect the box office sales.

The soundtrack used a lot of well-known songs and artists, like Elvis, a cover of Bad Reputation (although in the film Joan Jett's version was used) The Prodigy, Ellie Goulding and The Pretty Reckless. Some critised the use of well-known and "overused" songs as distracting. "Kick-Ass is let down by a soundtrack with too much baggage of its own"