Mischa Barton's butt thanks

Mischa Barton was so comfortable with director Richard Attenborough she let him shoot her butt.The former 'O.C' star, who agreed to go topless in last year's 'Closing The Ring', was happy to go a little further on Attenborough's relaxed movie set.She said: "You do see me topless in that film. I would never do full body but I did let Richard Attenborough get a brief behind shot as well."Mischa, 22, insists she is happy to show off her body on the big screen if the role requires it.Mischa - who showed off her enviable figure in 2006 comedy 'The Oh In Ohio' - said: "I take it project by project. In that film it was really necessary. You don't see full boobs or anything. I was wearing underwear. I don't mind nudity. I just don't do it that often."Meanwhile, Mischa's arraignment - which relates to her being charged with driving under the influence (DUI) and possession of marijuana - has been postponed until April 10.The arraignment - which also includes charges of driving without a valid license and with a blood alcohol level of .08 per cent or higher - was scheduled to take place at Beverly Hills Superior Court today (29.02.08).