Martin Lancelot Barre is an English guitarist best known for his longtime role as lead guitarist of British rock band Jethro Tull, with whom he recorded and toured from 1968 until the band's initial dissolution in 2011. Barre played on all of Jethro Tull's studio discography except for their 1968 debut album This Was and their 2022 album The Zealot Gene. In the early 1990s he began a solo career, and has recorded several albums as well as touring with his own live band.