Sondheim is best known for his work on Broadway, where he composed both music and lyrics for a number of successful musicals, including:
- "A Little Night Music" (1973)
- "Sweeney Todd: Demon Barber of Fleet Street" (1979)
- "Sunday in the Park with George" (1984)
- "Into the Woods" (1987)
2) Films
Sondheim also composed music for several films, including:
- "Stavisky" (1974)
- "Reds" (1981)
- "Dick Tracy" (1990)
3) Television
Sondheim composed music for the television productions of:
- "Evening Primrose" (1966)
- "Follies" (1985)