Fausto Rossi, who plays Emilio, and Vera Rossi, who plays his sister, really are brother and sister. And they really are the children of actress Sonia Gessner, who plays their mother in the film.
Despite the success of the film and the personal recognition obtained, Fausto Rossi, who plays Emilio, has never wanted to shoot other movies.
The interiors of the house of the protagonists were shot in the house of the director Paolo Taviani, who was in the United States during that time.
Included among the "1001 Movies You Must See Before You Die", edited by Steven Schneider.