The Mauritanian is a 2021 legal drama film directed by Kevin Macdonald from a screenplay written by M.B. Traven, Rory Haines, and Sohrab Noshirvani. The film is based on the 2015 memoir Guantánamo Diary by Mohamedou Ould Slahi, a true story of Slahi's experience of being held for fourteen years without charge in the Guantanamo Bay detention camp. The film stars Jodie Foster, Tahar Rahim, Shailene Woodley, and Benedict Cumberbatch.  

The Mauritanian was released in the United States on February 12, 2021 by STXfilms. In the United Kingdom, where all cinemas were closed due to the COVID-19 pandemic, the planned theatrical release was cancelled and the film premiered on Amazon Prime Video on April 1, 2021. It received mixed reviews from critics, but the performances of Rahim and Foster were praised. At the 78th Golden Globe Awards the pair were nominated for Best Actor – Motion Picture Drama and Best Supporting Actress – Motion Picture, respectively, with Foster winning. At the 74th British Academy Film Awards the film received five nominations, including Best Film.