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The Mauritanian is a 2021 legal drama film directed by Kevin Macdonald and starring Tahar Rahim, Jodie Foster, Benedict Cumberbatch, and Shailene Woodley. The film is based on the 2015 memoir Guantanamo Diary by Mohamedou Ould Slahi, a Mauritanian man who was held without charge at the Guantanamo Bay detention camp for 14 years. Woodley plays Nancy Hollander, a defense attorney who represents Slahi.