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