Claudia-Laurie Corbeil
Caillou (voice)

Violette Chauveau
Mousseline / Clémentine (voice)

Nathalie Coupal
Doris (voice)

Gilbert Lachance
Boris / Rexy / Gilbert (voice)

Mario Desmarais
Grandfather (voice)

Johanne Garneau
Léo / André / Miss Martin / Jonathan / Sébastien (voice)

Hugolin Chevrette
Nounours (voice)

Ellen David
Miss Martin (voice)

Annie Bovaird
Caillou (voice)

Pat Fry
Daddy (voice)

Jennifer Seguin
Mommy (voice)

Jesse Vinet
Rosie (voice)

Merlee Shapiro
Narrator (voice)

Pauline Little
Grandma (voice)

George Morris
Grandpa (voice)

Brigid Tierney
Clementine (voice)

Amanda Tilson
Sarah (voice)

Sophie Léger
Sarah (voice)

Luis de Cespedes
Mr. Lajoie (voice)

Sophie Faucher
Narrator (voice)