Marcus Tuul is a guitarist from Estonia, who has acquired a bachelor's degree of jazz performance in University of Tartu Viljandi Culture Academy.

Marcus has worked as a sideman in various musical projects (Ingrid Rabi Group, Anna Lea Haamer Quintet, Big Band Tartu, etc). Marcus is also a member of a group called Any Key Trio, with whom he released an album of original music in the beginning of 2023.