Olivia Haigh Williams (born 26 July 1968) is a British actress. Trained at the Bristol Old Vic Theatre School and a member of the Royal Shakespeare Company, she began her career in theatre. She gained international recognition in the late 1990s, appearing in productions such as *The Postman* (1997), Wes Anderson's *Rushmore* (1998), and the acclaimed *The Sixth Sense* (1999). Her performance in Roman Polanski's political thriller *The Ghost Writer* (2010) earned her numerous critical accolades, including the National Society of Film Critics Award for Best Supporting Actress. Her versatile filmography also includes titles such as *An Education* (2009) and *The Father* (2020). On television, she is known for her role as Adelle DeWitt in the series *Dollhouse* (2009–2010), and since 2022, she has portrayed Camilla Parker Bowles in the hit series *The Crown*, a role for which she has shared several industry award nominations with the cast, such as the Screen Actors Guild Awards.