Annbjørg Lien (born 15 October 1971) is a Norwegian musician, playing the hardingfele (Hardanger fiddle), violin, and nyckelharpa.

She has traveled to Africa, Asia, Australia, Argentina, Bhutan, Greenland, Iceland, Sri Lanka, North America, and other parts of Europe, and worked with musicians from many countries.

[1] Her 2008 project Waltz With Me brought together American fiddler, guitarist and singer Bruce Molsky, Swedish violist Mikael Marin and Canadian cellist Christine Hanson for a concert commissioned by the Telemark Festival.

With Arve Moen Bergset, Bjørn Ole Rasch and Steinar Ofsdal, she is a member of the folk music group Bukkene Bruse.

[1][2][3] In 2019 she received her PhD degree in hardingfele (Hardanger fiddle games) from the University of Agder.