According to The Hollywood Reporter, 48-year-old actor Sam Rockwell is in final negotiations to add his name to the already impressive cast of director Adam McKay's biopic of former vice president Dick Cheney. Christian Bale is portraying Republican politician Cheney - who was the 46th Vice President of the United States from 2001 to 2009 - whilst Steve Carell, Amy Adams and Bill Pullman are also attached to the project. Carell is playing Donald Rumsfeld, the Secretary of Defence under President Bush whom Cheney served under, with Adams being lined up to star as the Vice President's wife Lynne Cheney.