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