What a beautiful classic… All music is composed by Leonard Bernstein and lyrics written by Stephen Sondheim. When released, the soundtrack spent 54 weeks at No. 1 on Billboard's album charts, giving it the longest run at No. 1 of any album in history. Perhaps Michael Jackson's Thriller comes close, on the grounds that West Side Story was listed on a chart for stereo albums only at a time when many albums were recorded in mono.