Françoise Rosay
— Mrs. Morelli-Johnson
Anny Duperey
— Marthe
Bruno Pradal
— Alain Morelli
Philippe Clay
— Jack Bromfield
Olivier Hussenot
— Me Weidman
Daniel Ceccaldi
— Gérard Chardonnet
Henri-Jacques Huet
— Judicial police inspector
Harald Leipnitz
— Victor Masson
Madeleine Barret
Madeleine Bouchez
— Friend of Mrs. Morelli, card player
Florence Brière
— Maid of Mrs. Morelli
Madeleine Clervanne
— Friend of Mrs. Morelli, card player
Corinne Lahaye
— Secretary of Gérard Chardonnet
Pippo Mérisi
Siegfried Rauch
Alexandre Rignault
Katia Tchenko
David Tonelli
Janine Souchon
— Dismissed companion (uncredited)