- Penelope Dudley-Ward
- Joan Heseltine
- Michael Wilding
- Tom Gilbey
- Lilli Palmer
- Brigid Knudsen
- Claude Dauphin
- François de Freycinet
- Albert Lieven
- Felix Demborski
- Peggy Cummins
- Bobbie Heseltine
- Roland Culver
- Sir Cosmo Brandon
- Margaret Rutherford
- Lady Christabel Beauclerk
- Martin Miller
- Schmidt
- Paul Demel
- M. Saladoff
- Beryl Measor
- Miss Faljambe
- Guy Middleton
- Captain Standish
- Esma Cannon
- Queenie
- Ivor Barnard
- Mr. Quill
- Paul Bonifas
- Monsieur Rolland
- Richard Turner
- Delivery Man
- André Randall
- Dutch Officer
- Gerard Heinz
- Polish Officer
- Vida Hope
- An A.T.
- Primula Rollo
- A Second A.T.
- Heather Boys
- A Third A.T.
- Alexander Witkin
- Italian Delegate
- Gordon Begg
- Grandfather Gilbey
- Andreas Malandrinos
- Man in Gallery
- Felix Aylmer
- Mr. Spaggot
- Cecil Bevan
- Mr. Jordan
- Johnnie Schofield
- Police Sergeant
- Judith Furse
- Elise Batter-Jones
- Maggie Rennie
- Glamour Girl
- Joan Misseldine
- Girl at Dance
- Beryl Laverick
- Girl at Dance
- Pauline Lord
- Girl at Dance
- Maureen Hurley
- Girl at Dance
- Peggy Carlisle
- (uncredited)
- Noel Dainton
- Footman
- Mabel Etherington
- Woman at Dance
- Irene Handl
- Female Delegate
- Anthony Holles
- Receptionist at 'Grand Hotel de Geneve'
- David Keir
- (uncredited)
- Louise Lord
- (uncredited)
- Ferdy Mayne
- Demborski's Geneva Associate
- Brian Nissen
- (uncredited)
- Patricia Owens
- Girl Getting Autograph
- MacDonald Parke
- Demborski's Geneva Associate
- Gerik Schjelderup
- Norwegian Officer
- Ian Selby
- Man at Dance
