How old were the actors in Lawless (2012)?

In 1931, the Bondurant brothers of Franklin County, Virginia, run a multipurpose backwoods establishment that hides their true business — bootlegging. Middle brother Forrest is the brain of the operation; older Howard is the brawn, and younger Jack, the lookout. Though the local police have taken bribes and left the brothers alone, a violent war erupts when a sadistic lawman from Chicago arrives and tries to shut down the Bondurants operation.