Elenco - Diamonds Are Brittle
Jean Seberg
Bettina Ralton
Claude Rich
Bernard Noblet
Elsa Martinelli
Juliette
Elisabeth Flickenschildt
Madame Ralton
Günther Jerschke
Goretti
Ady Berber
Max
Walter Roderer
Cuendet
Pierre Vernier
Roger
Jacques Morel
Amédée de St. Leu
Jean-Paul Moulinot
Jeweler
Jacques Balutin
Agent
France Rumilly
Lady with the ring
Daniel Ceccaldi
Captain of the boat
Claude Darget
Cantonal inspector
Henri Virlogeux
Picard
Annette Poivre
Cleaning lady
Jacques Dynam
Commissioner
Pierre Mirat
Brigadier
Jean-Pierre Rambal
Policeman
Jacques Santi
Traveler at the airport
Norma Dugo
Cleaning lady
Bernard Musson
Policeman
Louis Viret
PolicemanPaul Pavel
Brigadier
Marcel Gassouk
Brigadier
Günter Lüdke
MarcellinoWerner Schwier
Dr. WormsGünther Ungeheuer
Prof. Schmoll
Marcel Charvey
Ducret, member of the billiards club (uncredited)
André Dalibert
Policeman at the police station (uncredited)
Yves Elliot
Cantonal inspector (uncredited)
Marius Gaidon
Policeman at the police station (uncredited)Max Melder
(uncredited)