Akira Takaki

as Muumipeikko (voice)

Oiva Lohtander

as Muumipappa (Finnish version) (voice)

Niklas Åkerfelt

as Nuuskamuikkunen / Hemuli (Finnish / Swedish version) (voice)

Vesa Vierikko

as Narrator / Postman (Finnish version) (voice)

Maria Sid

as Muumimamma / Salome / Homssumuori (Finnish / Swedish version) (voice)

Diandra Flores

as Pikku Myy / Homssu-punapää / Mymmeli (Finnish version) (voice)

Saara Lehtonen

as Squirrel / Surku-koira / Vilijonkka / Homssu-pellavapää (Finnish version) (voice)

Nina Hedström

as Tuu-Tikki / Tahmatassu / Kampsu / Nyyti (Finnish version) (voice)