Actress : The Sixth Sense. An actress with talent and poise beyond her 21 years, Mischa Barton was born in London, England, to an Irish mother, Nuala (née Quinn), a photographer, and an English father, Paul Marsden Barton. Your premier Mischa Barton resource since 2004. Mischa is best known for starring as troubled Marissa Cooper on three seasons of The OC. Also tries to ignore stories about her