Sigtryggur was born in Norway to Icelandic parents. He was a founding member of the Sugarcubes and has been a longtime fixture on the Icelandic punk and alternative music scene. Other bands he has played in have included Þeyr, Kukl, Emiliana Torrini, Ben Frost, Kippi Kaninus, SJS BIGBAND, Headpump, Bradley Fish and the Reptile Palace Orchestra. He has played on numerous recording with many artists, Howie B, and Les Negresses Vertes. He also has recorded under the name of Bogomil Font, his own crooner alter ego.