Robert Downey Jr. RAVES Over Cillian Murphy's 'Oppenheimer' Performance (Exclusive)

Robert Downey Jr. and Cillian Murphy are teaming up for the true story about the atomic bomb used to end World War II in Christopher Nolan’s “Oppenheimer.” They sat down with “Extra’s” Melvin Robert to talk about the movie, in which Cillian plays J. Robert Oppenheimer, the father of the first nuclear weapon, while Robert heads the notorious Manhattan project. Robert also spoke about why he chose this film after bidding farewell to the MCU as Iron Man. “Oppenheimer” is in theaters July 21.