An English rock band based in London, the Rolling Stones formed in 1962, by guitarist and harmonica player Brian Jones, pianist Ian Stewart, vocalist Mick Jagger and guitarist Keith Richards. Bassist Bill Wyman and other various musicians, such as saxophonist Bobby Keys, also performed with the early lineups. During the 1960s, they pioneered the gritty, heavy-driven sound that would come to define hard rock. They have been active for almost six decades and have been one of the most popular and long lasting bands of their time.