Akira Takaki

Muumipeikko (Finnish version) (voice)

Oiva Lohtander

Muumipappa (Finnish version) (voice)

Niklas Åkerfelt

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

Vesa Vierikko

Narrator / Postman (Finnish version) (voice)

Maria Sid

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

Diandra Flores

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

Saara Lehtonen

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

Nina Hedström

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

Terrence Scammell

Ancestor (Swedish version) (voice)

Stellan Skarsgård

Moomin Pappa (Swedish version) (voice)

Bill Skarsgård

Moomintroll (Swedish version) (voice)

Alicia Vikander

Little My / Sorry-oo (Swedish version) (voice)

Stina Ekblad

Berättare / Too-Ticki / Gamla Homsan (Swedish version) (voice)