The Beatles were an English rock band formed in Liverpool in 1960 who became the most commercially successful and critically acclaimed act in the history of popular music. Their best-known lineup consisted of John Lennon, Paul McCartney, George Harrison, and Ringo Starr. Rooted in skiffle and 1950s rock and roll, they later utilised several genres, ranging from pop ballads to psychedelic rock, often incorporating classical and other elements in innovative ways. In the early 1960s, their enormous popularity first emerged as "Beatlemania", but as their songwriting grew in sophistication, they came to be perceived by many fans and cultural observers as an embodiment of the ideals shared by the era's sociocultural revolutions.
The Beatles built their reputation playing clubs in Liverpool and Hamburg over a three-year period from 1960. Manager Brian Epstein moulded them into a professional act and producer George Martin enhanced their musical potential. They gained popularity in the United Kingdom after their first single, "Love Me Do", became a modest hit in late 1962. They acquired the nickname the "Fab Four" as Beatlemania grew in Britain over the following year, and by early 1964