Zac Efron

Richard Samuels

Christian McKay

Orson Welles

Claire Danes

Sonja Jones

Ben Chaplin

George Coulouris

Zoe Kazan

Gretta Alder

Eddie Marsan

John Houseman

Kelly Reilly

Muriel Brassler

James Tupper

Joseph Cotten

Leo Bill

Norman Lloyd

Patrick Kennedy

Grover Burgess

Aidan McArdle

Martin Gabel

Al Weaver

Sam Leve

Thomas Arnold

George Duthie

Megan Maczko

Evelyn Allen

Jo McInnes

Jeannie Rosenthal

Iain McKee

Vakhtangov

Simon Nehan

Joe Holland

Travis Oliver

John Hoyt

Simon Lee Phillips

Walter Ash

Daniel Tuite

William Mowry

Imogen Poots

Lorelei Lathrop

Saskia Reeves

Barbara Luddy

Shane James Bordas

Conspirator

Alessandro Giuggioli

Conspirator

Harry Macqueen

Conspirator

Rhodri Orders

Conspirator

Michael J. McEvoy

Epstein

Garrick Hagon

Dr. Mewling

Aaron Brown

Longchamps Kid #1

Emily Allen

Virginia Welles

David Garbutt

Mercury French Horn Player

Jay Irving

Mercury Percussion Player

Steven Parry

Mercury Trumpet Player

Marlene Sidaway

Grandmother Samuels

Robert Wilfort

Radio Director

Michael Brandon

Les Tremayne

Nathan Osgood

Radio Announcer

Janie Dee

Mrs. Samuels

Eddi Reader

Singer

Jools Holland

Band Leader

Gilson Lavis

Drummer

Dave Swift

Double Bass

Mark Flanagan

Guitar

Fayyaz Virji

Trombone

Michael Rose

Tenor Sax

Phil Veacock

Alto Sax & Clarinet

Nick Lunt

Baritone Sax

Jason McDermid

Trumpet

John Young

Longchamps Kid #2

Greg Bennett

Hobo

Cris Blanco

Museum Patron (uncredited)

Lexie Lambert

Lizzy (uncredited)

John Patten

Theatre Owner (uncredited)

Chris Wilson

Studion Foley Artist (uncredited)