as Le commissaire Jules Maigret

as Émilie Petersen

as Madame Van Bell

as Arthur Donge

as Charlotte Donge

as L'inspecteur Lucas

as Le juge d'instruction

as Fred Petersen

as Ginette, la femme de service

as Ramuel

as Hélène Donnegan, la secrétaire des Petersen

as Rosalie, la bonne de Fualdès

as La chanteuse du cabaret

as Dussart, le veilleur de nuit du Majestic

as Le directeur de l'Agence Internationale

as Enrico Fualdès

as Le directeur du Majestic

as Le petit Teddy Petersen

as Le remplaçant de Donge (uncredited)

as Un commis de cuisine (uncredited)

as Le chauffeur de taxi (uncredited)

as (uncredited)

as La concierge de Maigret (uncredited)

as Delormel, l'employé de banque (uncredited)

as (uncredited)

as Un cuisinier (uncredited)

as Le jeune cuistot (uncredited)

as Un inspecteur (uncredited)

as Madame Marcelle, employée aux cuisines (uncredited)

as Un inspecteur (uncredited)

as Le chef cuisinier (uncredited)

as La chanteuse (voice) (uncredited)