The Conspirator's Stephen Root is set to join director Robert Redford's The Company You Keep.

The chilling story centers around an ex-Weather activist who is on the run, when a zealous reporter (Shia LaBeouf) unravels his true identity. The FBI cold case story will take Jason Sinai (Robert Redford), through a nationwide manhunt for a murder during a bank robbery in the 1970's. Susan Sarandon and Julie Christie will play Ex-Weather Underground associates who were involved with the robbery. Richard Jenkins plays a college professor who has information surrounding the militants in hiding.

Stephen Root will be playing Billy Cusimano.

No production date has been set.