Thomas Gullestad lost 15kg (33 pounds) in just 8 weeks for the role.
The background actor Ottar Pedersen was one of those who helped Jan Baalsrud when he was 14 years old.
Jonathan Rhys Meyers doesn't speak German at all and had to learn his lines in just two months.
Every year at the end of July, the Jan Baalsrud March takes place. It is 200 kilometers long and crosses the islands of Rebbenesøya and Ringvassøya, the Lyngen peninsula and the mainland east of Lyngenfjorden. The march takes eight days and you can do either all of the march or just part of it.
Thomas Gullestad (Jan Baalsrud) suffered from frost damage on his hands after he was buried in the snow without gloves when it was almost -30°C.