Lee Mark Ranaldo (born February 3, 1956) is an American guitarist, singer and songwriter, best known as a co-founder of the rock band Sonic Youth. In 2004, Rolling Stone ranked Ranaldo at number 33 on its "Greatest Guitarists of All Time" list. In May 2012, Spin published a staff-selected top 100 guitarist list, ranking Ranaldo and his Sonic Youth bandmate Thurston Moore together at number 1.