The Beatles were an English rock band formed in Liverpool in 1960. With the line-up comprising of John Lennon, Paul McCartney, George Harrison and Ringo Starr, they are regarded as one of the most influential bands of all time. The group was integral to the development of 1960s counterculture and popular music's recognition as an art form. Rooted in skiffle, beat and 1950s rock and roll, their sound incorporated elements of classical music and traditional pop in innovative ways; the band later explored music styles ranging from ballads and Indian music to psychedelia and hard rock.