Less than three weeks after director Steven Spielberg dropped out of American Sniper, Warner Bros. has chosen Clint Eastwood to replace him. Bradley Cooper is still attached to star as the deadliest sniper in U.S. military history.

Both Steven Spielberg and DreamWorks parted ways with the project, leaving Warner Bros. in full control of this adaptation written by Jason Dean Hall (Paranoia), based on Navy SEAL Chris Kyle's best-selling memoir. Here's the book's official description.

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"He is the deadliest American sniper ever, called "The Devil" by the enemies he hunted and "The Legend" by his Navy SEAL brothers. From 1999 to 2009, U.S. Navy SEAL Chris Kyle recorded the most career sniper kills in United States Military history. The Pentagon has officially confirmed more then 150 of Kyle's kills (the previous American record was 109), but it has declined to verify the astonishing total number for this book. Iraqi insurgents feared Kyle so much they named him Al-Shaitan ("the devil") and placed a bounty on his head. Kyle earned a legendary status among his fellow SEALS, Marines, and U.S. Army soldiers, who he protected with deadly accuracy from rooftops and stealth positions. Gripping and unforgettable, Kyle's masterful account of his extraordinary battlefield experiences of all time.

A native Texan who learned to shoot on childhood hunting trips with his father, Kyle was a champion saddle-bronc rider prior to joining the Navy. After 9/11, he was thrust into the front lines of the War of Terror, and soon found his calling as a world-class sniper who performed best under fire. In Fallujah, where he recorded a personal-record 2,100-yard kill shot, Kyle braved heavy fire to rescue a group of Marines trapped on the street; in Ramadi, he stared down insurgents with his pistol in close combat. Kyle talks honestly about the pain of war-of twice being shot and experiencing the tragic deaths of two close friends."

Clint Eastwood is currently prepping his upcoming musical Jersey Boys, which begins production this fall. It isn't known when shooting may begin on American Sniper.