Rachael Atlanta Stirling (born 30 May 1977 in London, England) is an English actress.
Her first major role was Nan Astley in the BBC miniseries Tipping the Velvet alongside Keeley Hawes. She later went on to co-star in the mystery series The Bletchley Circle. Her films include The Triumph of Love, The Young Victoria, Salmon Fishing in the Yemen, Snow White & the Huntsman and Their Finest. She has twice been nominated for the Laurence Olivier Award for her theater roles.
She is the daughter of the late Dame Diana Rigg, with whom she acted in an episode of Doctor Who that was specially written for them. They also played as mother and daughter in Detectorists.
- The Triumph of Love (2001): Corine.
- Othello (2001): Lulu.
- Tipping the Velvet (2002): Nan Astley.
- Poirot, episode "Five Little Pigs" (2003): Caroline Crale.
- Marple, episode "The Murder at the Vicarage" (2004): Griselda Clement.
- The Young Victoria (2009): Duchess of Sutherland.
- Salmon Fishing in the Yemen (2012): Mary Jones.
- Snow White & the Huntsman (2012): Anna.
- The Bletchley Circle (2012, 2014, 2018): Camilla "Millie" Harcourt.
- Doctor Who, episode "The Crimson Horror" (2013): Ada Gillyflower.
- Detectorists (2014-2017): Rebecca.
- Their Finest (2016): Phyl Moore.