One of Broadway’s most renowned and prolific songwriters, Stephen Sondheim has died aged 91, CNN reports. Sondheim is perhaps best known for writing the lyrics to legendary Broadway musicals 'West Side Story' and 'Gypsy'. Sondheim wrote the music and lyrics to a slew of musicals, and has over the course of his long career, won eight Tony awards, eight Grammys, and an Oscar.