Tirill Mohn (; born 22 February 1975), also known mononymously as Tirill, is a Norwegian composer, singer and violinist. She was a member of the art rock band White Willow, and has released several solo albums.
Mohn is a descendant of the artists Christian Krohg and Oda Krohg. In 2019 she married the composer Marcus Paus; she and her husband are distantly related as both are descendants of Norway's first attorney-general Bredo Henrik von Munthe af Morgenstierne Sr.