Pierre Clémenti
— Giacobbe I and II
Tina Aumont
— Salesgirl
Sergio Tofano
— Professor Petrushka
Giulio Cesare Castello
— Professor Mozzoni
Romano Costa
— Clara's father
Antonio Maestri
— Professor 'Tre Zampe'
Mario Venturini
— Professor
Alessandro Cane
— Student
Gianpaolo Capovilla
— Student
Ninetto Davoli
— Student
Vittorio Fanfoni
— Student
Luigi Antonio Guerra
— Student
Giuseppe Mangano
— Student
Giancarlo Nanni
— Student
Stefano Oppedisano
— Student
Salvatore Samperi
— Student
Umberto Silva
— Student
Stefania Sandrelli
— Clara