British actress who won an Academy Award for Best Supporting Actress for her role in the 2007 film Michael Clayton. She also plays the White Witch in the Chronicles of Narnia film franchise. Her other film credits include Snowpiercer, Only Lovers Left Alive, The Grand Budapest Hotel, Doctor Strange, and Trainwreck.
She joined the Communist Party while studying at Cambridge University.
She earned a Golden Globe nomination for Best Actress for her work in the 2001 thriller The Deep End.
She married John Byrne in 1989. The couple had twins in 1997 and divorced in 2005.