Andreina Mazzotto's debut.
Vanda Tibursi's debut.
Adriana Gallandt's debut.
In the French-dubbed version of the film (it is an Italian-French co-production), the main character played by Aldo Fabrizi is called Charles Dupont, instead of Carlo Calrloni, in the Italian version... This is why the film was released in France as "Sa majesté Monsieur Dupont" and not "Première communion", which would have been the exact translation of "Prima comunione".