The 39-year-old actress will star with Michael Fassbender in a live-action adaptation of the Ubisoft video game. The 37-year-old actor is slated to play protagonist Desmond Miles, but details on Cotillard's character are being kept under wraps.
Justin Kurzel will helm the film, and recently directed Cotillard and Fassbender in an upcoming adaptation of the William Shakespeare play Macbeth. The Assassin's Creed movie began production this week, and opens in theaters Dec. 12, 2016.
Also read: Donuts Drift on the AppÂ Store