Jean-Paul Belmondo
Doctor Paul Simay
Mia Farrow
Christine Dupont
Laura Antonelli
Martine Dupont
Marlène Appelt
Nurse Carole
Daniel Lecourtois
Professor Dupont
Daniel Ivernel
Doctor Berthier
Patrick Préjean
Arthur Ringard
Michel Peyrelon
Joseph Melville
Josiane Balasko
Ugly girl (uncredited)
Christian Chauvaud
Friend of Dr. Popaul (uncredited)
Patrice Énard
(uncredited)
Louis Navarre
Suitor of Martine (uncredited)
André Penvern
(uncredited)
Daniel Villattes
(uncredited)