The official trailer to American Sniper has been unveiled. Directed by Clint Eastwood, Bradely Cooper stars as a U.S. Navy Seal named Chris Kyle, the most deadly sniper in American Military History. The film will depict Chris's life during his four years in Iraq while trying to balance his family life back home being a father and husband. American Sniper hits theaters in the U.S. on Christmas Day. Watch the official trailer above.