Emma Appleton

Thomasina Hanbury

Stefanie Martini

Martha Hanbury

Rory Fleck-Byrne

Lt. Sebastian Holloway

Aaron Monaghan

Major. Henry Cobcroft

Theodora Brabazon Legge

Young Thomasina Hanbury

Francesca Brabazon Legge

Young Martha Hanbury

Eva O'Brien

Teenage Thomasina

Chacha Seigne

Lola Hanbury

Shaun Boylan

Reginald Watson

Neil Hannon

Reginald Watson (voice)

Lorcan Cranitch

Major. General Norbury

Ian Toner

German Soldier at Checkpoint

Michael Hulsmann

German Soldier at Checkpoint (voice)

Hugh O'Conor

Enoch Johnson

Serena Brabazon

Rachel Johnson

Aran Murphy

Leo

Ayvianna Snow

Rebecca Cavendish

Nick Dunning

Television Newsreader

William Forrest

Young Reginald Watson

Richard Elfyn

Winston Churchill / Various Voices (voice)

Gerald Tyler

Various Voices (voice)

Hamish Stanfeld

Various Voices (voice)

Philip Condron

Sturmführer Hemplestall

Frank Armstrong

St. Paul's Nazi #1

Matthew McCann

St. Paul's Nazi #2

Melanie Leonard

Reginald Watson's Dancer #1

Ciara Nash

Reginald Watson's Dancer #2

Anja Nicholson

Reginald Watson's Dancer #3

David Bowie

Self - Singer (archive footage)

Adolf Hitler

Self - Politician (archive footage)

Winston Churchill

Self - Politician (archive footage)

Franklin D. Roosevelt

Self - Politician (archive footage)

Oswald Mosley

Self - BUF Leader (archive footage)

Joseph P. Kennedy Sr.

Self - Diplomat (archive footage)

Ian Dillon

German Wermacht Officer (uncredited)