Diamonds Are Brittle

Bernard Noblet is a modest bank clerk with a passion for billiards. His fiancée Juliette, a schoolteacher, dreams of one day living the high life, and his best friend Roger, a little-known inventor, is equally despairing. After careful consideration, a solution emerges: a cleverly organized hold-up will enable them to live in luxury for the rest of their lives. Bernard soon makes the acquaintance of Bettina and her mother, Madame Ralton, professionals in the "heist" business.

• Nicolas GessnerDirector
• Charles SpaakWriter
• Nicolas GessnerWriter

• Jean SebergBettina Ralton
• Claude RichBernard Noblet
• Elsa MartinelliJuliette
• Elisabeth FlickenschildtMadame Ralton
• Günther JerschkeGoretti
• Ady BerberMax
• Walter RodererCuendet
• Pierre VernierRoger
• Jacques MorelAmédée de St. Leu
• Jean-Paul MoulinotJeweler
• Jacques BalutinAgent
• France RumillyLady with the ring