Education
Christiansen graduated from the Norwegian Acting Academy in 2000.
Christiansen graduated from the Norwegian Acting Academy in 2000.
He started his professional career at the Trøndelag Teater in Trondheim, Norway. Later he joined the Det Norske Teatret in Oslo. He has also starred in the Swedish 2008 picture Arn – The Kingdom at Road"s End.
He then became the first actor to collect an Amanda, a Gullruten and a Hedda award.
He later voiced Hans in the Norwegian dub of Disney"s "Frozen". Christiansen played Herman Watzinger in the 2012 adaptation of Thor Heyerdahl"s Kon-Tiki.