Peter Mattemore
Eileen Forbes
Harold Quonset
Hoffman
Schmidlap
Gen. 'Howling Bull' Hallenby
Igor Valkleinokov
Anna Soblova
Ponsonby
Esther Davenport
Russian Delegate
American Delegate
Deuce Hawkins (as Alex D'Arcy)
Peggy
Ted Robertson
Roger Carlyle, BBC TV Announcer
Narrator (voice) (as Colonel John 'Shorty' Powers)
Ceremony Guest (uncredited)
Russian Premier Roskov (uncredited)
Reporter (uncredited)
Delegate (uncredited)
Breckinridge, the Maitre d' (uncredited)
Official (uncredited)
Waitress (uncredited)
Naval Officer at Space Launch (uncredited)
Mrs. Soblova (uncredited)
Restaurant Patron (uncredited)
Clergyman (uncredited)
Stella Mary (uncredited)
Reporter / Air Force Officer at Space Launch (uncredited)
Ruby Pearl (uncredited)