Image Entertainment acquired the film at Cannes and will open it in theaters Sept. 6. Winnie Mandela stars Jennifer Hudson as the longtime wife of South African activist-turned-President Nelson Mandela (Terrence Howard) who fights for her husband’s freedom during his long incarceration, endures 18 months of solitary confinement of her own and battles to help end apartheid. The movie from writer-director Darrell J. Roodt hits theaters nearly four months ahead of Mandela: Long Walk To Freedom, the Weinstein Company’s biopic about Nelson Mandela starring Idris Elba.

Related: Cannes: Winnie Mandela Hostile To Biopic About Her