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 often regarded as the most influential band of all time.The group were integral to the evolution of popular music as an art form and to the development of the counterculture of the 1960s. Rooted in skiffle, beat and 1950s rock and roll, their sound incorporated elements of classical music and traditional pop in innovative ways, and they later explored music styles ranging from ballads and Indian music to psychedelia and hard rock. They also pioneered recording techniques, advanced new methods of artistic presentation, and were commonly viewed as emblems of the era's sociocultural movements.
Led by the band's primary songwriters, Lennon and McCartney, the Beatles built their reputation playing clubs in Liverpool and Hamburg over a three-year period from 1960, initially with Stuart Sutcliffe playing bass. The core trio of Lennon, McCartney and Harrison, who had been together since 1958, went through a succession of drummers, including Pete Best, before asking Starr to join them in 1962. Manager Brian Epstein moulded them into a professional act, and producer George Martin guided and developed their recordings, greatly expanding their domestic success after their first hit, "Love Me Do", in late 1962. As their popularity grew into the intense fan frenzy dubbed "Beatlemania", the band acquired the nickname "the Fab Four", with Epstein, Martin and other members of the band's entourage sometimes given the informal title of "fifth Beatle".