About Oppenheimer Oppenheimer (/ˈɒpənhaɪmər/ OP-ən-hy-mər) is a 2023 epic biographical thriller film written and directed by Christopher Nolan. It stars Cillian Murphy as J. Robert Oppenheimer, the American theoretical physicist credited with being the “father of the atomic bomb” for his role in the Manhattan Project—the World War II undertaking that developed the first nuclear […]