Sgt. Pepper's Lonely Hearts Club Band is the eighth studio album by English rock band The Beatles. It was first released on 26 May 1967 in the United Kingdom by Parlophone and on 2 June in the United States by Capitol Records. After the band permanently retired from touring in August 1966, member Paul McCartney suggested an idea for a song involving an Edwardian military band that ultimately formed the impetus of the Sgt. Pepper concept. After recording sessions began in November, he later suggested the band release an entire album representing a performance by the fictional Sgt. Pepper band. This would give the Beatles freedom to experiment musically, and as a result, they furthered the technological progression they had made with their previous album Revolver (1966).