The plot takes place in Norway, but was shot mostly in Canada.
Julia Pauline Boracco Braathen got the role competing with 800 other girls and before the filming had to train physically and learn to climb.
In advance, animal experts, both in Scandinavia and elsewhere in Europe, had given a clear message that the film could not be made with real wolves, and recommended dogs or hybrids in the lead roles. Director and screenwriter Peder Norlund was determined that the movie should filmed with real wolves. Finally, the film team found animal trainers in the United States and trained wolves in the United States, who could provide the necessary security for 12-year-old Julia Pauline Boracco Braathen.