Mischa Anne Marsden Barton born 24 January 1986 is an English - American fashion model, film, television, and stage actress, best known for her role as Marissa Cooper in the American television series The O.C.. She has two sisters, younger Hania and elder Zoe, a barrister in London. she became a naturalised citizen of the United States in 2006. Barton graduated from the Professional Children's School in Manhattan in 2004, and took a summer short course called Acting Shakespeare at The Royal Academy of Dramatic Art in London, in June and July 2006, at Sir Richard Attenborough's urging, after he directed her in Closing the Ring. Find the latest Hollywood Actress Mischa Barton wallpaper, latest Mischa Barton Photos, Hot Mischa Barton pictures, hot American Actress Wallpapers, Hollywood celebrity Mischa Barton sexy images & New Mischa Barton wallpaper.