West Side Story is the soundtrack album to the 1961 film West Side Story, featuring music by Leonard Bernstein and lyrics by Stephen Sondheim. Released in 1961, the soundtrack spent 54 weeks at No. 1 on Billboard's stereo albums charts, giving it the longest run at No. 1 of any album in history, although some lists instead credit Michael Jackson's Thriller, on the grounds that this run for West Side Story was on a chart for stereo albums only at a time when many albums were recorded in mono. It did also spend 6 weeks at the top of the Billboard chart for mono albums. In 1962, it won a Grammy award for "Best Sound Track Album – Original Cast". In the United States, it was one of the best-selling albums of the 1960s, certifying three times platinum by the RIAA on November 21, 1986.