EXCLUSIVE: Oscar nominees James Cromwell and Bruce Dern have signed on for Emperor, joining previously announced star Dayo Okeniyi in the Civil War-abolitionist film directed by former Lionsgate exec Mark Amin. Paul Scheer, Harry Lennix, Naturi Naughton, Mykelti Williamson, Ben Robson, Keean Johnson, and Kat Graham…

EXCLUSIVE: Dayo Okeniyi, best known for his role in The Hunger Games as well as NBC's Shades of Blue, has been tapped as the lead in Emperor, a Civil War-era historical drama from Sobini Films. Former Lionsgate exec and Sobini founder Mark Amin is directing the pic.

Written by Amin and Pat Charles, the screenplay is in…