Casts

• 

  Cillian Murphy

  J. Robert Oppenheimer

• 

  Emily Blunt

  Kitty Oppenheimer

• 

  Matt Damon

  Leslie Groves

• 

  Robert Downey Jr.

  Lewis Strauss

• 

  Florence Pugh

  Jean Tatlock

• 

  Josh Hartnett

  Ernest Lawrence

• 

  Casey Affleck

  Boris Pash

• 

  Rami Malek

  David Hill

• 

  Kenneth Branagh

  Niels Bohr

• 

  Benny Safdie

  Edward Teller

• 

  Jason Clarke

  Roger Robb

• 

  Dylan Arnold

  Frank Oppenheimer

• 

  Tom Conti

  Albert Einstein

• 

  James D'Arcy

  Patrick Blackett

• 

  David Dastmalchian

  William Borden

• 

  Dane DeHaan

  Kenneth Nichols

• 

  Alden Ehrenreich

  Senate Aide

• 

  Tony Goldwyn

  Gordon Gray

• 

  Jefferson Hall

  Haakon Chevalier

• 

  David Krumholtz

  Isidor Rabi

• 

  Matthew Modine

  Vannevar Bush

• 

  Scott Grimes

  Counsel

• 

  Kurt Koehler

  Thomas Morgan

• 

  John Gowans

  Ward Evans

• 

  Macon Blair

  Lloyd Garrison

• 

  Harry Groener

  Senator McGee

• 

  Gregory Jbara

  Chairman Magnuson

• 

  Ted King

  Senator Bartlett

• 

  Tim DeKay

  Senator Pastore

• 

  Steven Houska

  Senator Scott

• 

  Petrie Willink

  Dutch Student

• 

  Matthias Schweighöfer

  Werner Heisenberg

• 

  Alex Wolff

  Luis Alvarez

• 

  Josh Zuckerman

  Rossi Lomanitz

• 

  Rory Keane

  Hartland Snyder

• 

  Michael Angarano

  Robert Serber

• 

  Emma Dumont

  Jackie Oppenheimer

• 

  Sadie Stratton

  Mary Washburn

• 

  Britt Kyle

  Barbara Chevalier

• 

  Guy Burnet

  George Eltenton

• 

  Tom Jenkins

  Richard Tolman

• 

  Louise Lombard

  Ruth Tolman

• 

  Michael Andrew Baker

  Joe Volpe

• 

  Jeff Hephner

  Congressman

• 

  Olli Haaskivi

  Edward Condon

• 

  David Rysdahl

  Donald Hornig

• 

  Josh Peck

  Kenneth Bainbridge

• 

  Jack Quaid

  Richard Feynman

• 

  Brett DelBuono

  Concerned Scientist

• 

  Gustaf Skarsgård

  Hans Bethe

• 

  James Urbaniak

  Kurt Gödel

• 

  Trond Fausa Aurvåg

  George Kistiakowsky

• 

  Devon Bostick

  Seth Neddermeyer

• 

  Danny Deferrari

  Enrico Fermi

• 

  Christopher Denham

  Klaus Fuchs

• 

  Jessica Erin Martin

  Charlotte Serber

• 

  Ronald Auguste

  J. Ernest Wilkins

• 

  Máté Haumann

  Leo Szilard

• 

  Olivia Thirlby

  Lilli Hornig

• 

  Jack Cutmore-Scott

  Lyall Johnson

• 

  Harrison Gilbertson

  Philip Morrison

• 

  James Remar

  Henry Stimson

• 

  Will Roberts

  George C. Marshall

• 

  Pat Skipper

  James Byrnes

• 

  Steve Coulter

  James Conant

• 

  Jeremy John Wells

  AAF Officer

• 

  Sean Avery

  Weatherman

• 

  Adam Kroeger

  Army Captain

• 

  Drew Kenney

  Soldier

• 

  Bryce Johnson

  AAF Officer 2

• 

  Flora Nolan

  Burn Victim

• 

  Kerry Westcott

  Laughing Woman

• 

  Christina Hogue

  Kissing Woman

• 

  Clay Bunker

  Kissing Man

• 

  Tyler Beardsley

  Weeping Man

• 

  Maria Teresa Zuppetta

  Consoling Woman

• 

  Kate French

  Presidential Aide

• 

  Gary Oldman

  Harry Truman

• 

  Hap Lawrence

  Lyndon Johnson

• 

  Meg Schimelpfenig

  Senator's Assistant (uncredited)