Dame Kristin Ann Scott Thomas (born 24 May 1960) is a British actress. A five-time BAFTA Award and Olivier Award nominee, she won the BAFTA Award for Best Actress in a Supporting Role for Four Weddings and a Funeral (1994) and the Olivier Award for Best Actress in 2008 for the Royal Court revival of The Seagull. She was nominated for the Academy Award for Best Actress in The English Patient (1996).

Scott Thomas made her film debut in Under the Cherry Moon (1986), and won the Evening Standard Film Award for Most Promising Newcomer for A Handful of Dust (1988). Her work includes Bitter Moon (1992), Mission: Impossible (1996), The Horse Whisperer (1998), Gosford Park (2001), The Valet (2006), and Tell No One (2007). She won the European Film Award for Best Actress for Philippe Claudel's I've Loved You So Long (2008). Her other films include Leaving (2009), Love Crime (2010), Sarah's Key (2010), Nowhere Boy (2010), The Woman in the Fifth (2011), Only God Forgives (2013), Darkest Hour (2017), and Tomb Raider (2018). On television, she was nominated for a Primetime Emmy Award for her guest appearance in the second season of the comedy series Fleabag (2019), and has starred in the Apple TV+ spy series Slow Horses since 2022.