Matt Damon Leslie Groves
Christopher Nolan Director, Producer, Writer
Emily Blunt Kitty Oppenheimer
Gary Oldman Harry Truman
Robert Downey Jr. Lewis Strauss
Florence Pugh Jean Tatlock
Cillian Murphy J. Robert Oppenheimer
Benny Safdie Edward Teller
Rami Malek David Hill
Kenneth Branagh Niels Bohr
Flora Nolan Burn Victim
James Remar Henry Stimson
Casey Affleck Boris Pash
Jack Quaid Richard Feynman
Josh Hartnett Ernest Lawrence
Devon Bostick Seth Neddermeyer
Gregory Jbara Chairman Magnuson
David Dastmalchian William Borden
Matthew Modine Vannevar Bush
Michael Angarano Robert Serber
Gustaf Skarsgård Hans Bethe
James Woods Executive Producer
Dane DeHaan Kenneth Nichols
Jason Clarke Roger Robb
George Cottle Stunt Coordinator
Tony Goldwyn Gordon Gray
David Krumholtz Isidor Rabi
Matthias Schweighöfer Werner Heisenberg
Olivia Thirlby Lilli Hornig
Emma Thomas Producer
James D'Arcy Patrick Blackett
Ludwig Göransson Original Music Composer
Jefferson Hall Haakon Chevalier
Alden Ehrenreich Senate Aide
Josh Peck Kenneth Bainbridge
Guy Burnet George Eltenton
Scott Grimes Counsel
Anthony Molinari Stunts
Hoyte van Hoytema Director of Photography
Alex Wolff Luis Alvarez
Louise Lombard Ruth Tolman
Tom Conti Albert Einstein
Dylan Arnold Frank Oppenheimer
David Rysdahl Donald Hornig
Christopher Denham Klaus Fuchs
Macon Blair Lloyd Garrison
Josh Zuckerman Rossi Lomanitz
Tim DeKay Senator Pastore
Emma Dumont Jackie Oppenheimer
John Papsidera Casting
Steve Coulter James Conant
Richard King Supervising Sound Editor, Sound Designer
Harry Groener Senator McGee
James Urbaniak Kurt Gödel
Trond Fausa Aurvåg George Kistiakowsky
Harrison Gilbertson Philip Morrison
Kate French Presidential Aide
Bryce Johnson AAF Officer 2
Gary Rizzo Sound Re-Recording Mixer
Nilo Otero First Assistant Director
Jeff Hephner Congressman
Brett DelBuono Concerned Scientist
Ted King Senator Bartlett
Ellen Mirojnick Costume Design
Thomas Hayslip Executive Producer, Unit Production Manager
Jennifer Lame Editor
Danny Deferrari Enrico Fermi
Pat Skipper James Byrnes
Sadie Stratton Mary Washburn
Danny Downey Stunts
Charles Roven Producer
Kevin O'Connell Sound Re-Recording Mixer