Mischa in Toronto

Former 'The O.C.' star Mischa Barton has dumped Marissa Cooper`s designer duds and bad habits for a good old U.S. milk mustache. Barton, whose character was killed in the season finale of the Fox TV drama, was announced Tuesday as the newest face of the U.S. milk industry`s 'got milk?' milk mustache campaign. During a recent visit to New York, Barton told Newsweek magazine she did not waste any time mourning Marissa Cooper. 'I was really excited that I get to die, to be honest,' she said. 'I`ve done pretty much everything else with the character. It was better than one of those lame farewells.' The actress who was born in London and raised in New York said she is now turning her focus toward film roles. 'I was also thinking of spending a month in London, living there and taking a course in acting,' she said. [MandC]