Terry-Thomas

Cadogan de Vere Carlton-Browne

Peter Sellers

Prime Minister Amphibulos

Luciana Paluzzi

Princess Ilyena

Ian Bannen

Young King Loris

Thorley Walters

Colonel Bellingham

Raymond Huntley

Foreign Secretary Tufton-Slade

Miles Malleson

Resident Advisor Davidson

John Le Mesurier

Grand Duke Alexis

Marie Lohr

Lady Carlton-Browne

Kynaston Reeves

Sir Arthur Carlton-Browne

Ronald Adam

Sir John Farthing

John Van Eyssen

Hewitt

Nicholas Parsons

Rodgers

Irene Handl

Mrs. Carter

Harry Locke

Gaillardian commentator

Basil Dignam

Security Officer

Sam Kydd

Signaller

John Glyn-Jones

Newsreel Interviewer

Marianne Stone

Woman In Cinema

Margaret Lacey

Onlooker

Kenneth Griffith

Sir John's Assistant (uncredited)

Mario Fabrizi

Deputy Minister (uncredited)

Andre Charisse

Russian Minister

Anthony Chinn

Dignitary at Royal Pageant

Maurice Colbourne

First Official

Harold Kasket

Marne Maitland

Archipolagos

Alf Mangan

Delegate

Patrick Mynhardt

British Soldier

Guy Standeven

Civil Servant

Austin Trevor

Secretary General

Ian Wilson

Onlooker

Michael Ward

Hotel Manager