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