Elisabeth Moss has joined the cast of Truth alongside Robert Redford and Cate Blanchett.

Truth follows the scandal that broke out after Dan Rather, reporting for 60 Minutes II, claimed that George W. Bush had received preferential treatment putting him in the Texas Air National Guard to avoid the Vietnam War draft. The aftermath during George W. Bush's re-election campaign left Dan Rather's reputation in shreds and resulted in the firing of his key producer Mary Mapes.

James Vanderbilt, who has written for the first two installments of The Amazing Spider-Man franchise, is set to make his directorial debut with the film. The screenplay will be based on the 2005 memoir Truth And Duty: The Press, The President, And The Privilege Of Power penned by Mary Mapes.

Robert Redford is set to play Dan Rather, with Cate Blanchett playing Mary Mapes. Elisabeth Moss will play CBS veteran Lucy Scott, now a journalism professor in Dallas, who was tasked with being Mary Mapes' new associate producer to "run point" on the scandal.

Elisabeth Moss is currently wrapping her 7th and final season of Mad Men, and was recently cast to star in the Broadway revival of The Heidi Chronicles which begins next year. She is also shooting Queen of Earth for director Alex Ross Perry. She recently wrapped shooting on Meadowland and the thriller High-Rise.

Elisabeth Moss is rumored to be up for the lead female detective role in True Detective Season 2, but she may be too busy to take on the coveted part.