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 popular music during the 1960s, and their songs and recordings continue to be celebrated across the world. With a sound rooted in skiffle, beat and 1950s rock and roll, their style later incorporated elements of soul, psychedelia and hard rock. They are seen as pioneers in the development of pop music and the countercultural movement of the 1960s.