Gilbert Sicotte
— Narrator (voice)
Maxime Collin
— Léolo
Ginette Reno
— Mother
Julien Guiomar
— Grandfather
Giuditta Del Vecchio
— Bianca
Andrée Lachapelle
— Psychiatrist
Denys Arcand
— Director
Germain Houde
— Teacher
Yves Montmarquette
— Fernand
Lorne Brass
— Fernand's enemy
Pierre Bourgault
— Word Tamer
Roland Blouin
— Father
Geneviève Samson
— Rita
Marie-Hélène Montpetit
— Nanette
Francis St-Onge
— Léolo, 6 ans
Alex Nadeau
— Fernand, age 16
Louis Grenier
— Gynecologist
Richard Guèvremont
— Geography Teacher
Éric Cadorette
— Little Godin
Aron Tager
— Fishmonger
Luc Séguin
— Latourelle
Simon Gosselin
— Paquette
Jacques Marcotte
— Fisher
Cat Lemieux
— Regina
Nick Fasano
— Italian Salesman
Jade Landry-Cuerrier
— Young Nanette
Magalie Beauregard
— Young Rita
Simon Lavigne
— Bébé
Amedeo Carlo Mangiu
— Tommaso
Maria Petraglia
— Contadina