Ernest

Forest Whitaker

Ernest

Lambert Wilson

La Grise (voice)

Anne-Marie Loop

Celestine

Mackenzie Foy

Célestine (voice)

Pauline Brunner

Rat Judge

Paul Giamatti

Georges (voice)

Patrice Melennec

Chef de Clinique

Dominique Collignon

Head Dentist

William H. Macy

Brigitte Virtudes

Lucienne

Megan Mullally

George

Nick Offerman

Léon (voice)

Léonard Louf

Hartmut Neugebauer

Grizzly Judge

Jeffrey Wright

Juge Grizzly

Féodor Atkine

Paulina Rümmelein

The Grey One

Lauren Bacall

Voice

Susanne Blakeslee

Chef de la police des Ours (voice)

Vincent Grass

Chef de la police des Rats (voice)

Patrice Dozier

Bettina Redlich

Voice

Ashley Boettcher

Eva Maria Bayerwaltes

Monsieur Rançonnet (voice)

Jacques Ciron

Nina

Ashley Brooke

Big Rat Nurse

Marsha Clark

Célestine (enfant) (voice)

Garance Pauwels

Voice

Bob Joles

Juge Rat (voice)

Pierre Baton

Martin (voice)

Ethan Louis Samuels DiSalvio

Various Characters (voice)

Spike Spencer

Additional Voices (voice)

Hunter Maki

Additional Voices (voice)

Maxime Bailleul

Additional Voices (voice)

Kémil Belhadj

Additional Voices (voice)

Yanis Belhadj

Additional Voices (voice)

José António Barbosa de Oiveira

Additional Voices (voice)

Swann Bey

Additional Voices (voice)

Simon Brunner

Additional Voices (voice)

Samuel Cahu

Additional Voices (voice)

Adeline Chetail

Additional Voices (voice)

Thierry d'Armor

Additional Voices (voice)

Michel Elias

Additional Voices (voice)

Jennifer Fauveau

Additional Voices (voice)

Ambre Foubert

Additional Voices (voice)

Nathalie Homs

Additional Voices (voice)

Warren Homs

Additional Voices (voice)

Pascale Jacquemont

Additional Voices (voice)

Gwenaelle Jegou

Additional Voices (voice)

Sofiane Larcher-Guessoum

Additional Voices (voice)

Emmanuel LeMire

Additional Voices (voice)

Ornella Louf

Head Nurse Mouse (voice)

Perrette Pradier

Avocat d'Ernest (voice)

Yann Le Madic