Rosamund Pike is also on board to co-star in the movie, which begins production in July.
Cooper will write and direct the film, in addition to producing with “Black Mass” producer John Lesher, along with Ken Kao, who is also financing the pic through Waypoint Entertainment.
Set in 1892, “Hostiles” tells the story of a legendary Army captain (played by Bale) who agrees to escort a dying Cheyenne war chief and his family back to tribal lands. The former rivals encounter a young widow (Pike) whose family was murdered on the plains while making the harrowing and perilous journey from an isolated Army outpost in New Mexico to the grasslands of Montana. They must join forces to overcome the punishing landscape and hostile Comanche tribes that they encounter along the way.
Plemons has been cast as a younger member of Bale’s cavalry unit who is tasked with helping the group reach its destination.
Plemons and Cooper last collaborated on the Whitey Bulger biopic “Black Mass.” Plemons has been alternating between film and TV work in the last couple of years, with the AMC drama “Breaking Bad” and the FX comedy “Fargo.” He appeared in the film “The Master” and, most recently, “Bridge of Spies” alongside Tom Hanks, and the Sundance pic “Other People” alongside Molly Shannon.
Plemons is repped by Talentworks and David Matlof.