Robin Williams has signed on to the growing cast of The Butler for Sony Pictures and director Lee Daniels (Precious).

The actor will play the 34th President of the United States, Dwight D. Eisenhower, in this biopic about longtime White House butler, Eugene Allen (Forest Whitaker), who served eight Presidents. Allen began his White House employment in 1952, under President Harry S. Truman. He retired in 1986, during President Ronald Reagan's second term in office.

Other Presidential roles include John Cusack as Richard Nixon, Liam Neeson as Lyndon B. Johnson, and Alan Rickman as Ronald Reagan, with Jane Fonda playing Nancy Reagan.

Danny Strong co-wrote the screenplay with Lee Daniels, with production scheduled to start in the very near future.

Robin Williams will move right from The Butler to The Angriest Man in Brooklyn, a project we first reported on back in May.

Daniel Taplitz wrote the screenplay, centering on a man (Robin Williams) who is wrongly told he only has 90 minutes left to live. He uses the time he has left to connect with his friends and family, while the young doctor (Mila Kunis) tries to track the patient down and tell him he was misdiagnosed. Phil Alden Robinson is directing, with shooting scheduled to begin in September.