Christopher Nolan Director, Screenwriter, Producer Cillian Murphy J. Robert Oppenheimer Actor Emily Blunt Kitty Oppenheimer Actor Robert Downey Jr. Lewis Strauss Actor Matt Damon Leslie Groves Jr. Actor Rami Malek David Hill Actor Florence Pugh Jean Tatlock Actor Benny Safdie Edward Teller Actor Michael Angarano Robert Serber Actor Josh Hartnett Ernest Lawrence Actor Kenneth Branagh Niels Bohr Actor Casey Affleck Boris Pash Actor Dane DeHaan Kenneth Nichols Actor Dylan Arnold Frank Oppenheimer Actor David Krumholtz Isidor Rabi Actor Alden Ehrenreich Senate Aide Actor Matthew Modine Vannevar Bush Actor Josh Peck Kenneth Bainbridge Actor Gary Oldman Harry Truman Actor Jason Clarke Actor Jack Quaid Actor David Dastmalchian Actor Olli Haaskivi Actor James D'Arcy Actor Guy Burnet Actor Danny Deferrari Actor Matthias Schweighöfer Actor Harrison Gilbertson Actor Emma Dumont Actor Devon Bostick Actor Alex Wolff Actor Trond Fausa Actor Emma Thomas Producer Charles Roven Producer Hoyte Van Hoytema Cinematographer Jennifer Lame Film Editing Ludwig Göransson Original Music