Before filming began, the film was already sold to more than 15 countries.
Biggest opening weekend for a Danish film since 2010 with 154,215 tickets sold.
Nikolajs mother and grandmother was both declared Jehovah's Witnesses.
Jakob Oftebro (Pasgård) & Jacob Lohmann (Elias) also worked together on Gidseltagningen (2017) as Alpha & Jonas respectively.
Nikolaj Lie Kaas (Carl Mørck) & Jacob Lohmann (Elias) also worked together on The Killing (2007) as Mathias Borch & Dyhring respectively.