Trailer
Cast
Trond Fausa Aurvåg
George Kistiakowsky
Jessica Erin Martin
Charlotte Serber
Steven Houska
Senator Scott
Alex Wolff
Luis Alvarez
Louise Lombard
Ruth Tolman
Brett DelBuono
Concerned Scientist
Gustaf Skarsgård
Hans Bethe
Danny Deferrari
Enrico Fermi
Sean Avery
Weatherman
Florence Pugh
Jean Tatlock
Dane DeHaan
Kenneth Nichols
Tony Goldwyn
Gordon Gray
Emma Dumont
Jackie Oppenheimer
Bryce Johnson
AAF Officer 2
Clay Bunker
Kissing Man
Olli Haaskivi
Edward Condon
Jack Quaid
Richard Feynman
James Remar
Henry Stimson
Drew Kenney
Soldier
Kerry Westcott
Laughing Woman
Kate French
Presidential Aide
Cillian Murphy
J. Robert Oppenheimer
Jack Cutmore-Scott
Lyall Johnson
Robert Downey Jr.
Lewis Strauss
Macon Blair
Lloyd Garrison
Rory Keane
Hartland Snyder
James Urbaniak
Kurt Gödel
Gary Oldman
Harry Truman
David Krumholtz
Isidor Rabi
Jefferson Hall
Haakon Chevalier
Britt Kyle
Barbara Chevalier
Petrie Willink
Dutch Student
Michael Andrew Baker
Joe Volpe
Harrison Gilbertson
Philip Morrison
Adam Kroeger
Army Captain
Christina Hogue
Kissing Woman
Hap Lawrence
Lyndon Johnson
Casey Affleck
Boris Pash
Jeff Hephner
Congressman
Devon Bostick
Seth Neddermeyer
Olivia Thirlby
Lilli Hornig
Pat Skipper
James Byrnes
Steve Coulter
James Conant
Kurt Koehler
Thomas Morgan
Josh Zuckerman
Rossi Lomanitz
Jeremy John Wells
AAF Officer
Flora Nolan
Burn Victim
Maria Teresa Zuppetta
Consoling Woman
Emily Blunt
Kitty Oppenheimer
Benny Safdie
Edward Teller
Dylan Arnold
Frank Oppenheimer
Matthew Modine
Vannevar Bush
Scott Grimes
Counsel
Matthias Schweighöfer
Werner Heisenberg
Michael Angarano
Robert Serber
Sadie Stratton
Mary Washburn
Kenneth Branagh
Niels Bohr
Jason Clarke
Roger Robb
Harry Groener
Senator McGee
Tim DeKay
Senator Pastore
Guy Burnet
George Eltenton
Josh Peck
Kenneth Bainbridge
Ronald Auguste
J. Ernest Wilkins
Will Roberts
George C. Marshall
John Gowans
Ward Evans
Meg Schimelpfenig
Senator's Assistant (uncredited)
Matt Damon
Leslie Groves
Josh Hartnett
Ernest Lawrence
Gregory Jbara
Chairman Magnuson
Tom Jenkins
Richard Tolman
David Rysdahl
Donald Hornig
Máté Haumann
Leo Szilard
Tyler Beardsley
Weeping Man
Rami Malek
David Hill
Ted King
Senator Bartlett
Christopher Denham
Klaus Fuchs
Tom Conti
Albert Einstein
James D'Arcy
Patrick Blackett
David Dastmalchian
William Borden
Alden Ehrenreich
Senate Aide