Robert Redford has signed on to play Dan Rather in Truth, a film based on the 2005 memoir Truth and Duty: The Press, the President, and the Privilege of Power.

The book, written by Rather's producer Mary Mapes, centers on the firestorm that erupted in September of 2004 after Rather reported that George W. Bush had received special treatment while serving in the Air National Guard during the Vietnam War, a report that was based on some documents that were suspected to be forgeries. PHOTOS Robert Redford: Exclusive Portraits of the Film Icon in New Mexico Cate Blanchett is attached to play Mapes, who was fired after the scandal, which was dubbed "Rathergate."