The film, to be directed by Deon Taylor, will also star Joe Anderson, Derek Luke, Evan Ross, Stacey Dash and Dawn Olivieri.
The drama, which is based on a true story, focuses on a paroled white supremacist who has just killed a cop and takes an African American family.
Glover appeared on Broadway in Master Harold…and the Boys. His many film credits include Dreamgirls, Places in the Heart, and the Lethal Weapon series.
Mount's stage credits include The Three Sisters and Mourning Becomes Electra. He currently stars on AMC's Hell on Wheels. His other upcoming films include Code Name: Geronimo and Safe.