| Person | Type | Job | Role(s) |
|---|---|---|---|
 Tove Jansson | Crew | Writing | Novel |
 Heikki Kossi | Crew | Sound | Foley Artist |
 Łukasz Targosz | Crew | Sound | Original Music Composer, Orchestrator, Musician |
 Tom Carpelan | Crew | Production | Producer |
 Michał Fojcik | Crew | Sound | Sound Director |
Przemysław Chruścielewski | Crew | Editing | Editor |
 Natalia Kukulska | Crew | Sound | Vocals |
Ira Carpelan | Crew | Writing | Writer, Director, Producer, Production Design |
Grzegorz Wacławek | Crew | Production | Co-Producer, Line Producer |
Piotr Szczepanowicz | Crew | Editing | Editor, Production Design, Writer |
Jakub Wroński | Crew | Editing | Editor, Director, Animation |
Małgorzata Więckowicz-Żyła | Crew | Writing | Writer |
Jacek Wiśniewski | Crew | Sound | Foley Artist |
 Bill Skarsgård | Cast | Actor | Moomintroll (Swedish version) (voice) |
 Niklas Åkerfelt | Cast | Actor | Nuuskamuikkunen / Hemuli (Finnish / Swedish version) (voice) |
 Nina Hedström | Cast | Actress | Tuu-Tikki / Tahmatassu / Kampsu / Nyyti (Finnish version) (voice) |
 Oiva Lohtander | Cast | Actor | Muumipappa (Finnish version) (voice) |
 Stellan Skarsgård | Cast | Actor | Moomin Pappa (Swedish version) (voice) |
 Stina Ekblad | Cast | Actress | Berättare / Too-Ticki / Gamla Homsan (Swedish version) (voice) |
 Terrence Scammell | Cast | Actor | Ancestor (Swedish version) (voice) |
 Vesa Vierikko | Cast | Actor | Narrator / Postman (Finnish version) (voice) |
 Maria Sid | Cast | Actress | Muumimamma / Salome / Homssumuori (Finnish / Swedish version) (voice) |
 Alicia Vikander | Cast | Actress | Little My / Sorry-oo (Swedish version) (voice) |
Akira Takaki | Cast | Actor | Muumipeikko (Finnish version) (voice) |
Diandra Flores | Cast | Actress | Pikku Myy / Homssu-punapää / Mymmeli (Finnish version) (voice) |
Saara Lehtonen | Cast | Actress | Squirrel / Surku-koira / Vilijonkka / Homssu-pellavapää (Finnish version) (voice) |
| Person | Type | Job | Role(s) |
