- Dolores Hart
- Donna Stuart
- Hugh O'Brian
- First Officer Ray Winsley
- Karlheinz Böhm
- Baron Franz Von Elzingen
- Pamela Tiffin
- Carol Brewster
- Lois Nettleton
- Hilda 'Bergie' Bergstrom
- Dawn Addams
- Katie Rinard
- Karl Malden
- Walter Lucas
- Richard Wattis
- Oliver Garson
- Andrew Cruickshank
- Cardwell
- James Dobson
- Flight Engineer Teddy Shepard
- Lois Maxwell
- Gwen Sandley
- John Crawford
- Co-Pilot
- Robert Easton
- Navigator
- Guido Wieland
- Vienna Policeman
- Maurice Marsac
- Monsieur Rinard
- Alain Morat
- Boy in Paris
- George Coulouris
- Vienna Police Inspector
- Andreas Malandrinos
- Night Clerk at Hotel de France
- André Maranne
- French Hotel Clerk
- Ferdy Mayne
- Vienna Hotel Clerk
- Martin Miller
- Room Service Waiter
- Robert Nichols
- Nickerson
- Guy Kingsley Poynter
- Flight Attendant
- Victor Rietti
- Old Passenger
- Hans Schumm
- Viennese Gardner
