Terje Gewelt was born June 8, 1960 in Oslo, Norway and grew up in Larvik, a small town on the southeastern coast. He started playing guitar at the age of 10, switched to electric bass at 14 and added acoustic bass at 17.
From 1979-81 he studied privately with the internationally recognized Norwegian bassist, Arild Andersen, and played in local jazz and fusion groups with, among others, the great Norwegian keyboardist Atle Bakken. In 1981, Terje went to the USA to study bass at the Bass Institute in Los Angeles. He studied electric bass with Jeff Berlin and acoustic bass with Bob Magnuson and played in jazz clubs around LA with guitarist Les Wise.
In 1982 he moved back to Oslo and spent a year playing with many of the best Norwegian jazz musicians