Is American Sniper based on a true story? The movie claims to tell the true story of Chris Kyle, but it took artistic liberties with Kyle’s life and changed the book’s narrative. Released in 2014, American Sniper charts Kyle’s childhood, early adulthood, military career, retirement, and ultimately his untimely death. Bradley Cooper stars as Kyle in director Clint Eastwood’s loose film adaptation of American Sniper: The Autobiography of the Most Lethal Sniper in U.S. Military History. The movie earned six Oscar nominations, including a Best Picture nomination for Eastwood and a Best Actor nomination for Cooper.