Rachel Bilson (born Rachel Sarah Bilson on August 25, 1981 in Los Angeles) is an American actress. She is best known as Summer Roberts on The O.C., an American television "dramedy", which focuses on the lives of the beautiful and wealthy in a gated Newport Beach community.

She is the grandaughter of director Bruce Bilson and the daughter of writer/director Danny Bilson. Her stepmother is Heather Medway, an actress and the mother of Rachel's two-year-old half-sister Hattie. She graduated from Notre Dame High School in 1999 where she appeared in such productions as Bye Bye Birdie, Once Upon a Mattress and The Crucible ... (read more )