Oppenheimer (2023) Cast & Character Guide — No Spoilers | Who's That?

Who plays who in Oppenheimer (2023)? Browse a spoiler-free character guide with photos of every major character and the actors behind them, including Cillian Murphy, Emily Blunt, Matt Damon.

• J. Robert Oppenheimer — played by Cillian Murphy
• Kitty Oppenheimer — played by Emily Blunt
• Leslie Groves — played by Matt Damon
• Lewis Strauss — played by Robert Downey Jr.
• Jean Tatlock — played by Florence Pugh
• Ernest Lawrence — played by Josh Hartnett
• Boris Pash — played by Casey Affleck
• David Hill — played by Rami Malek
• Niels Bohr — played by Kenneth Branagh
• Edward Teller — played by Benny Safdie
• Roger Robb — played by Jason Clarke
• Frank Oppenheimer — played by Dylan Arnold
• Albert Einstein — played by Tom Conti
• Patrick Blackett — played by James D'Arcy
• William Borden — played by David Dastmalchian
• Kenneth Nichols — played by Dane DeHaan
• Senate Aide — played by Alden Ehrenreich
• Gordon Gray — played by Tony Goldwyn
• Haakon Chevalier — played by Jefferson Hall
• Isidor Rabi — played by David Krumholtz