Bill Skarsgård brother Alexander Skarsgård was in the previous film.
Created from existing, vintage footage from original stop-motion Moomins productions co-produced by Jupiter Film and Film Polski in the 1980s (Hollywood Reporter, 5/19/2017).
The Swedish dub was one of the few not to use Finland-Swedes to voice the Moomins. This was meet with some backlash as audience and critics did not think the characters sounded like the Moomins.
Based on the Moomins which were created by the Finnish writer Tove Jansson in a series of books and comic strips, originally published in Swedish in the 1940s.