Watch free video Horizon: An American Saga Official Trailer

In the great tradition of Warner Bros. Pictures' iconic Westerns, "Horizon: An American Saga" explores the lure of the Old West and how it was won -- and lost -- through the blood, sweat and tears of many. Spanning the four years of the Civil War, from 1861 to 1865, Costner's ambitious cinematic adventure will take audiences on an emotional journey across a country at war with itself, experienced through the lens of families, friends and foes all attempting to discover what it truly means to be the United States of America.

Directed by Kevin Costner
Starring: Kevin Costner, Sienna Miller, Sam Worthington, Jena Malone, Owen Crow Shoe, Tatanka Means, Ella Hunt, Tim Guinee, Danny Huston, Colin Cunningham, Scott Haze, Tom Payne, Abbey Lee, Michael Rooker, Will Patton, Georgia MacPhail, Douglas Smith, Luke Wilson, Isabelle Fuhrman, Jamie Campbell Bower, Alejandro Edda, Wase Winyan Chief, Michael Anganaro, Angus Macfadyen, Jon Beavers, Alex Nibley, Kathleen Quinlan, Etienne Kellici, Amos Jason Charging Cloud, Bodhi Okuma Linton, Gregory Cruz, James Russo, Jeff Fahey, David O'Hara, Chris Conner, Leroy M. Silva, Bernardo Velasco, Tom Everett, Glynn Turman, Giovanni Ribisi