Mischa Anne Marsden Barton, (born 24 January 1986) is an English film, television, and stage actress, best known for her role as Marissa Cooper in the American television series The O.C.
Mischa Barton was born in Hammersmith, London, United Kingdom to an Irish mother, Nuala (née Quinn), a photographer, and an English father, Paul Marsden Barton, a foreign exchange broker. She has two sisters, Hania and Zoe Barton. Barton moved to New York City at the age of five and became a naturalised citizen of the United States in Los Angeles on 3 February 2006. Barton graduated from the Professional Children's School in Manhattan in 2004, and attended classes at The Royal Academy of Dramatic Art in the Summer of 2006.
Barton began acting at the age of eight (as she said on The Friday Night Project), co-starring in the Off Broadway premiere of Slavs!, written by Tony Kushner. She appeared in several other Off Broadway productions, taking a lead role in James Lapine's Twelve Dreams at Lincoln Center. She made her film debut in Lawn Dogs, which won awards at film festivals around the world. Since then, she has appeared in several films, such as The Sixth Sense, Notting Hill, St Trinians, and