Ilan Debrabant as Nicolas

Jean-Paul Rouve as Nicholas' father

Audrey Lamy as Nicholas' mother

Pierre Arditi as M. Moucheboume

Grégory Gadebois as Le Bouillon

Jean-Pierre Darroussin as Director

Adeline D'Hermy as Mistress

Noémie Lvovsky as Mrs. Bouillaguet

François Morel as Mr. Blédurt, the neighbor

Anton Alluin as Clotaire

Oscar Boissière as Alceste

Léandre Castellano-Lemoine as Agnan

Malo Chanson-Demange as Rufus

Simon Faliu as Geoffroy

Malick Laugier as Eudes

Léonard Signoret as Maixent

Philippe Uchan as Grifaton

Lise Lamétrie as Mémé

Claudine Acs as The Widow Zinzin

Catherine Davenier as Madame Moucheboume

Sandie Masson as Madame Grifaton

Matthieu Rozé as Museum guide

Capucine Sainson-Fabresse as Marie-Edwige

Juliette Gras as Marie-Edwige's girlfriend

Hubert Myon as Colleague Duparc

Gerald Cesbron as College of Nicholas' father

Pierre Pirol as College of Nicholas' father

Benoît Strulus as College of Nicholas' father

Cesar Duminil as Visitor to the house of Petit Nicolas

Claire Mechin as Mother of the visitor to the house of Petit Nicolas

Arnaud Pfeiffer as Rufus' father

Barbara Bolotner as Baker

Julie Maes as Supervisor

Guillaume Clémencin as Antique dealer

François Rostain as Bearded salesman

Dominique Langlais as Widow Zinzin's son

Christophe Grundmann as The mover

Antonin Maurel as Restaurant receptionist

Jacques Ledran as Waiter

Nicolas Audebaud as Substitute of Nicholas' father

Leny Morand as

Jean-Claude Bohbote as Fishmonger

Aleksandra Yermak as Mr. Moucheboume's secretary

Ted Etienne as An Invincible Adult (1990)

Thomas Grascoeur as An Invincible Adult (1990)

Florian Maubert as An Invincible Adult (1990)

Victor Bourigault as An Invincible Adult (1990)

Anthony Henrot as An Invincible Adult (1990)

Antonin Schopfer as An Invincible Adult (1990)

Tom Neal as An Invincible Adult (1990)

Paul Kaliszczak as An Invincible Adult (1990)

Diego Belet as Nicholas' classmate

Antonin Magret as Nicholas' classmate

Raphaël Boalouzet Domenech as Nicholas' classmate

Antoine Martel as Nicholas' classmate

Marius Guillevic as Nicholas' classmate

Clément Moch Roussel as Nicholas' classmate

Joseph Robinson as Nicholas' classmate

Thomas Beauvais as Nicholas' classmate

Gabriel Hervé as Nicholas' classmate

Thibault Vignon as Nicholas' classmate

Victor Deruelle as Nicholas' classmate

César Ohana as Nicholas' classmate

Noé Chaurang as Nicholas' classmate

Aurélien Cesson as Nicholas' classmate