
Olivia Haigh Williams (born July 26, 1968) is a British actress who has appeared in British and American films and television. Williams studied drama at the Bristol Old Vic Theatre School for two years followed by three years at the Royal Shakespeare Company. Her first significant screen role was as Jane Fairfax in the British television film Emma (1996), based on Jane Austen's novel.
She made her film debut in 1997's The Postman, followed by Rushmore (1998) and The Sixth Sense (1999). Williams also acted in the British films Lucky Break (2001), The Heart of Me (2002) and An Education (2009). She continued acting in films such as The Ghost Writer (2010), Hanna (2011), Anna Karenina (2012), Hyde Park on Hudson (2012), Maps to the Stars (2014), Victoria & Abdul (2017), and The Father (2020).
From 2017 to 2019, she played Emily Silk in the science fiction television series Counterpart. In 2022, Williams portrayed Camilla Parker Bowles in the Netflix historical drama The Crown in its fifth season, a role she is set to reprise in its sixth and final season.

The Sixth Sense
1999 · as Anna Crowe

The Father
2020 · as The Woman

Peter Pan
2003 · as Mary Darling

Seventh Son
2014 · as Mam Ward

Anna Karenina
2012 · as Countess Vronsky

Rushmore
1998 · as Rosemary Cross

Emma
1996 · as Jane Fairfax

Hanna
2011 · as Rachel

The Man from Elysian Fields
2001 · as Andrea

Valiant
2005 · as Victoria (voice)

The Postman
1997 · as Abby

An Education
2009 · as Miss Stubbs

Sabotage
2014 · as Caroline

Maps to the Stars
2014 · as Cristina Weiss

Victoria & Abdul
2017 · as Baroness Churchill

Man Up
2015 · as Hilary

The Ghost Writer
2010 · as Ruth Lang

Below
2002 · as Claire