Margaret Rutherford

Grand Duchess Gloriana XIII

Ron Moody

Prime Minister Rupert Mountjoy

Bernard Cribbins

Vincent Mountjoy

David Kossoff

Professor Kokintz

June Ritchie

Cynthia

Terry-Thomas

Maurice Spender

John Le Mesurier

British Delegate

John Phillips

Bracewell - U.S. Delegate

Eric Barker

M.I.5 Man

Roddy McMillan

Benter

Tom Aldredge

Wendover

Michael Trubshawe

British Aide

Peter Sallis

Russian Delegate

Clive Dunn

Bandleader

Hugh Lloyd

Plumber

Richard Lester