Deadline is reporting that Sienna Miller and Sam Worthington have signed on to star in Horizon joining previously announced cast members, Kevin Costner and Jamie Campbell Bower.
The film, which is being described as a historical epic about the American frontier, is a project close to Costner’s heart and will see him not only star but also return to the director’s chair for the first time since 2003.
Filming is set to begin later this month.
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