Cast 29

1. 

   Peter Sellers

   Grand Duchess Gloriana XII / Prime Minister Count Rupert Mountjoy / Tully Bascombe

2. 

   Jean Seberg

   Helen Kokintz

3. 

   William Hartnell

   Will Buckley

4. 

   David Kossoff

   Professor Alfred Kokintz

5. 

   Leo McKern

   Benter

6. 

   MacDonald Parke

   General Snippet

7. 

   Austin Willis

   United States Secretary of Defense

8. 

   Timothy Bateson

   Roger

9. 

   Monte Landis

   Cobbley

10. 

    Alan Gifford

    Air Raid Warden

11. 

    Colin Gordon

    BBC Announcer

12. 

    Harold Kasket

    Pedro

13. 

    Guy Deghy

    Soviet Ambassador (uncredited)

14. 

    Eve Eden

    Spectator (uncredited)

15. 

    Bill Edwards

    Army Captain (uncredited)

16. Mabel Etherington

    Ada - Lady in Waiting (uncredited)

17. Muriel Greenslade

    Lady in Waiting (uncredited)

18. Fred Haggerty

    Fenwickian (uncredited)

19. Juba Kennerley

    Maybury (uncredited)

20. George Margo

    O'Hara (uncredited)

21. 

    Lionel Murton

    American General at the Pentagon (uncredited)

22. 

    Bill Nagy

    U.S. Policeman (uncredited)

23. 

    Robert O'Neil

    Reporter (uncredited)

24. Pat Ryan

    American General (uncredited)

25. Stuart Saunders

    Sergeant (uncredited)

26. Fred Stroud

    Fenwickian (uncredited)

27. John Tatum

    American Admiral (uncredited)

28. 

    Mavis Villiers

    Telephone Operator (uncredited)

29. Fred Wood

    Bird Seller (uncredited)

Troupe 24