Peter Sellers
Grand Duchess Gloriana XII / Prime Minister Count Rupert Mountjoy / Tully Bascombe
Acting
Jean Seberg
Helen Kokintz
Acting
William Hartnell
Will Buckley
Acting
David Kossoff
Professor Alfred Kokintz
Acting
Leo McKern
Benter
Acting
MacDonald Parke
General Snippet
Acting
Austin Willis
United States Secretary of Defense
Acting
Timothy Bateson
Roger
Acting
Monte Landis
Cobbley
Acting
Alan Gifford
Air Raid Warden
Acting
Colin Gordon
BBC Announcer
Acting
Harold Kasket
Pedro
Acting
Guy Deghy
Soviet Ambassador (uncredited)
Acting
Eve Eden
Spectator (uncredited)
Acting
Bill Edwards
Army Captain (uncredited)
Acting
Mabel Etherington
Ada - Lady in Waiting (uncredited)
Acting
Muriel Greenslade
Lady in Waiting (uncredited)
Acting
Fred Haggerty
Fenwickian (uncredited)
Acting
Juba Kennerley
Maybury (uncredited)
Acting
George Margo
O'Hara (uncredited)
Acting
Lionel Murton
American General at the Pentagon (uncredited)
Acting
Bill Nagy
U.S. Policeman (uncredited)
Acting
Robert O'Neil
Reporter (uncredited)
Acting
Pat Ryan
American General (uncredited)
Acting
Stuart Saunders
Sergeant (uncredited)
Acting
Fred Stroud
Fenwickian (uncredited)
Acting
John Tatum
American Admiral (uncredited)
Acting
Mavis Villiers
Telephone Operator (uncredited)
Acting
Fred Wood
Bird Seller (uncredited)
Acting