Ari Alexander Ergis Magnússon was born in Reykjavik, Iceland, to an Icelandic father who was a playwright, film and theatre director and a Siberian-Yakutian mother who is an actress and visual artist. Magnusson's mother graduated from the acting school GITIS in Moscow and his father graduated from the legendary film school VGIK where his parents actually first met. They moved to Reykjavik, Iceland from Moscow in 1966 after his father lost faith in the utopian dream of the USSR.