Bourvil as Monsieur Dupont

Lando Buzzanca as Marcello Agost

Walter Chiari as Angelo Pincelli

Peter Cook as Maj. Digby Dawlish

Tony Curtis as Chester Schofield

Mireille Darc as Marie-Claude

Marie Dubois as Pascale

Gert Fröbe as Willi Schickel & Horst Muller

Susan Hampshire as Betty

Jack Hawkins as Count Levinovitch

Nicoletta Machiavelli as Dominique

Dudley Moore as Lt. Kit Barrington

Peer Schmidt as Otto

Eric Sykes as Perkins

Terry-Thomas as Sir Cuthbert Ware-Armitage

Hattie Jacques as Lady Journalist