パリ音楽院管弦楽団
Film critic Pauline Kael wrote that, allegedly, "the starving extras made away with some of the banquets before they could be photographed". Many of the 1,800 extras were Resistance agents using the film as daytime cover, who, until the Liberation, had to mingle with some collaborators or Vichy sympathisers who were imposed on the production by the authorities. Alexandre Trauner, who designed the sets, and Joseph Kosma, who composed the music, were Jewish and had to work in secrecy throughout the production. Music was provided by the Orchestre de la Société des Concerts du Conservatoire under the direction of renowned conductor, Charles Münch, who personally contributed part of his income to the French Resistance. Trauner lived (under an assumed name) with Carné and Prévert during the six months it took them to prepare the script. Maurice Thiriet, Kosma's orchestrator, acted as his front.