- Robert Naylor
- Katak
- Skyler Clark
- Lulu / Perline (voice)
- Eleanor Noble
- Sim / Marina / Madam Cod / Puffela / Beluga Calf (voice)
- Wyatt Bowen
- Albi / Scoop / Kami (voice)
- Mark Camacho
- Paparazzi / Seal 2 (voice)
- Angela Galuppo
- Estelle / Jack-Lynn / Puffin 2 (voice)
- Ginette Reno
- Grandma (English) / Mamie (French) (voice)
- Richard M Dumont
- Bosco / Old-Katak (voice) (as Richard M. Dumont)
- Ilana Zackon
- Naya
- Terrence Scammell
- Old-Nic / Jack-Knife (voice)
- Arthur Holden
- Cyrano / Seal 1 (voice)
- Jennifer Seguin
- Polestar
- Pauline Little
- Northstar / Adult Female Beluga (voice)
- Alexandre Bacon
- Katak
- Nancy Bernier
- Femelle béluga adulte / Veau béluga (voice)
- Jeff Boudreault
- Bosco
- Benoît Brière
- Paparazzi / Phoque 1 (voice)
- Jérémie Desbiens
- Albi
- Martin Drainville
- Scoop / Phoque 2 (voice)
- Marie-Thérèse Fortin
- Perlette / Macareux 2 (voice)
- Carolanne Foucher
- Sim / Boussole / Compas (voice)
- Yves Jacques
- Cyrano
- Émilie Josset
- Jack-Lyn
- Renaud Lacelle-Bourdon
- Kami
- Maxime Le Flaguais
- Katak-le-Vieux
- Jacques Leblanc
- Vieux-Nic
- Johanne Léveillé
- Autres voix
- Justine Major
- Estelle / Naïa / Morue 1 / Macadoune / Morue 2 (voice)
- Ludivine Reding
- Lulu
- Mario Saint-Amand
- Jack-Knife
- Guylaine Tremblay
- Marine
