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.