Enforced Method Acting: This film had in no ways the money to shot the outdoor scenes in a studio with fake snow. It was actually shot in the northern part of Sweden during winter, but not during the polar night against the director's wishes. It was so cold that actress Grete Havnesköld, who played Saga, started to cry, the actors playing the vampires had to walk around covered in blood during freezing rain, said freezing rain created a layer of "ice armor" of all of the film equipment and the cold caused the cameras to break down.
Hey, It's That Guy!: Half the cast. The other half were unknown and Petra Nielsen, the only star.
Swedish comedian Mikael Torving plays a cop. He later got cast as a police in a cop-show.
Grete Havnesköld who plays Saga is most famous in Sweden (and Japan) for playing Lotta in the movie Lotta på Bråkmakargatan from a novel by Astrid Lindgren. She is more famous for playing Saga in other countries now.
Mån Nathanielsson as Sebastian's friend. He has appeared in numerous Swedish films and television series.
Playing Against Type: Frostbite is the one Swedish film with a target audience above 12 that does not take a turn to be dark and depressing but rather cheerfully shows all the teens meeting either brutal death at the hands of the unholy demons or losing their immortal souls becoming said demons.
What Could Have Been: Originally, writer Daniel Ojanlatva intended the three storylines in the film to play out separately rather than intercut between each other. That way no one would understand fully the evil plot of the villain until the very end of the film.