George MacKay as Hugh Legat

Jannis Niewöhner as Paul von Hartman

Jeremy Irons as Neville Chamberlain

Robert Bathurst as Sir Nevile Henderson

Jessica Brown Findlay as Pamela Legat

August Diehl as Franz Sauer

Sandra Hüller as Helen Winter

Alex Jennings as Sir Horace Wilson

Ulrich Matthes as Adolf Hitler

Liv Lisa Fries as Lena

Abigail Cruttenden as Anne Chamberlain

Nicholas Farrell as Sir Alexander Cadogan

Martin Kiefer as Heinrich Himmler

Mark Lewis Jones as Sir Osmund Cleverly

Anjli Mohindra as Joan Menzies

Paul-Ernest Flanagan as Foreman Frank Wright

Nick Wymer as Maitre D'

Raphael Sowole as Cecil Syers

Ludwig Simon as Café Man Jakob

Nellie Thalbach as Café Woman Charlotte

Hannes Wegener as Captain Eric Kordt

Aidan Hennessey as Arthur Legat

Tara Nome Doyle as Singer

Rainer Sellien as Hans Oster

Helen Clyro as Miss Watson

Nicholas Shaw as Parliamentary Aide James Berwick

Richard Dillane as Colonel Menzies

Robert Bathurst as Sir Neville Henderson

Marcel Kowalewski as Young Man Brauhaus Alexander

Antonije Stankovic as Young Man Bauhaus Konrad

Marc Limpach as Dr. Paul Schmidt

Oscar Hoppe as SS Officer Schubert

Domenico Fortunato as Benito Mussolini

Stéphane Boucher as Édouard Daladier

Leni Erceg as Little Girl Inge

Margit Bendokat as Nurse Ida

Jean-Pascal Heynemand as Ritz Diner (uncredited)