When Aldo and Gina duck into a theater to elude the cops, the movie playing is Easy Living (1949) with Victor Mature and Lizabeth Scott.
One of the movie posters on the wall in Gina's room is for La Pantera Rosa, the Italian name for The Pink Panther (1963), and lists Peter Sellers as one of the stars.
Vittorio De Sica: as himself, directing the Biblical epic from which The Fox steals the film equipment.