The Rolling Stones are an English rock band formed in London in April 1962 by guitarist and harmonica player Brian Jones, pianist Ian Stewart, vocalist Mick Jagger and guitarist Keith Richards. Bassist Bill Wyman and drummer Charlie Watts completed the early lineup. American R&B and blues cover songs dominated The Rolling Stones' early material, but from the start they have included rock and roll in their repertoire. The Rolling Stones are credited for raising the international regard for the primitive blues typified by Chess Records' artists such as Willie Dixon and Muddy Waters, the latter of whom wrote the song "Rollin' Stone", after which the band is named..