Christopher Nolan's next film, Oppenheimer, added another high-profile actor to its already star-studded cast.John Hartnett is the latest to sign on to the Universal biopic that focuses onJ.
Robert Oppenheimer's role inthe development of the atomic bomb during World War II,according to Deadline.Leading the cast is Irish actor Cillian Murphy, who plays Oppenheimer, the scientist who ran the Manhattan Project that led to the invention of the atomic bomb, which were eventually dropped on the Japanese cities of Hiroshima and Nagasaki.
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