Gerard Butler: 'Nice to show butt'

Law Abiding Citizen star Gerard Butler has discussed his on-screen nudity at the film's Hollywood premiere.

The 39-year-old actor said that the scene was justified and not "gratuitous".

He told entertainment show Extra: "It's always nice to show a bit of butt.

"I don't think it was gratuitous. I think there is a good reason for my nakedness in this movie."

On the same subject, Butler's co-star Jamie Foxx said: "He has to do his whole thing for the ladies, which is great. But that's when we men go to the concession stands."