Atomic Energy Commission member Lewis Strauss, and Florence Pugh as Oppenheimer's communist lover Jean Tatlock.

The film also stars Emily Blunt as Oppenheimer's wife 'Kitty', Matt Damon as head of the Manhattan Project Leslie Groves, Robert Downey Jr. Sherwin, the film chronicles the career of Oppenheimer, with the story predominantly focusing on his studies, his direction of the Manhattan Project during World War II, and his eventual fall from grace due to his 1954 security hearing. Based on the 2005 biography American Prometheus by Kai Bird and Martin 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 weapons. Oppenheimer ( / ˈ ɒ p ən h aɪ m ər/ OP-ən-hy-mər) is a 2023 epic biographical thriller film written and directed by Christopher Nolan.