Petrus is a 1946 French comedy mystery crime film directed by Marc Allegret and starring Fernandel, Simone Simon, Marcel Dalio and Pierre Brasseur. Future star Corinne Calvet appears in a supporting role. It was shot at the Cité Elgé Studios in Paris and on location around the city. The film's sets were designed by the art director Max Douy. The film had admissions in France of 2,602,669.