The Beatles were an English rock band formed in Liverpool in 1960. With a line-up comprising John Lennon, Paul McCartney, George Harrison and Ringo Starr, they are regarded as the most influential band of all time. The group were integral to the evolution of pop music into an art form. Their sound, rooted in skiffle, beat and 1950s rock and roll, incorporated elements of classical music and traditional pop in innovative ways.