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