Emily Blunt and Matt Damon are reuniting in, director Christopher Nolan's new epic, which stars Cillian Murphy as J. Robert Oppenheimer, the theoretical physicist who led the Manhattan Project during World War II and is often credited as «the father of the atomic bomb.»Oppenheimer's life and work was full of complex characters, and Nolan has assembled a star-studded cast to tell the complicated story. Blunt stars as Katherine «Kitty» Oppenheimer, who was a German-American biologist and botanist and a member of the Communist Party of America, in addition to being Oppenheimer's wife.