1. On je nejlépe známý pro hraní role Tormund Giantsbane v HBO fantasy série Game of Thrones. In 2004, he graduated from the Russian Academy of Theatre Arts in Aarhus, Dánsko.
2. In 2015, Wyndham Hotel Group signed Hivju to serve as “Wyndham Rewards Wyzard” for its launch of a new loyalty program.
3. He is the son of Norwegian actor Erik Hivju, and the cousin of French actress Isabelle Nanty.