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