Bing Crosby
Harry Turner

Bob Hope
Chester Babcock

Joan Collins
Diane

Robert Morley
Leader of the 3rd Echelon

Walter Gotell
Dr. Zorbb

Felix Aylmer
Grand Lama

Dorothy Lamour
Dorothy Lamour

Roger Delgado
Jinnah

Jacqueline Jones
Blonde at Airport

Katya Douglas
3rd Echelon Receptionist

Robert Ayres
American Official

Alan Gifford
American Official

Peter Sellers
Indian Neurologist (uncredited)

David Niven
Lama who remembers Lady Chatterly's Lover (uncredited)

Dean Martin
The 'Grape' on Plutomium (uncredited)

Frank Sinatra
The 'Twig' on Plutomium (uncredited)

Dave King
Mr. Ahso - Chinese Restaurant Owner (uncredited)

Pat O'Brien
Chinese Restaurateur (uncredited)

Peter Madden
Lama, Slim (uncredited)

Bob Simmons
Astronaut (uncredited)

Nosher Powell
Astronaut (uncredited)

Tutte Lemkow
Hotel Servant (uncredited)

Robin Hughes
American Official (uncredited)

Harry Baird
Nubian at Lamasary (uncredited)

Victor Brooks
Leader's Man (uncredited)

Jerry Colonna
Man Looking For a Match (uncredited)

Edwina Carroll
Girl (uncredited)

Michel Mok
Undetermined Role (as Michele Mok)