Two alternative endings were considered. One involved a snowmobile chase and a hand-to-hand fight with Isabelle and Santa featuring handflares. The other would have featured Isabelle hiding in an abandoned boat frozen in a lake where she would have gotten into an axe fight with Santa and finally the boat would have exploded. These endings were cut due to budget and time constraints.
The blood and guts consisted of rose hip soup and cotton.
Director Niklasson admitted that he was drunk during most of the production, ranging from drinking way to many glasses of wine between takes too taking huge chunks of vodka with every take that he wasn't satisfied with.
The hardest role to cast was also the smallest. The role of the "man in the Volvo 240" was named Rolf in early stages as a homage to Rolf Lassgård and was also written with him in mind. The production did not manage to reach Lassgård. Being fans of the TV-series Skärgårdsdoktorn actress Ebba Hultqvist was also contacted but had to decline due to just having a child. The production did also try to get hold of Fredrik Wikingsson for the role but due to scheduling this also fell through. Martin Sazesh was eventually cast.
The script went through numerous drafts before it even centered around Santa and Christmas. The first draft differed seriously from the final film and revolved around shape-shifting aliens which spaceship had crashed in a mining town in the remote wilderness of Sweden where a group of kids would spend the night.