Sweeney Todd: The Demon Barber of Fleet Street is a 1979 musical with music and lyrics by Stephen Sondheim and book by Hugh Wheeler. It is based on the 1970 play Sweeney Todd by Christopher Bond. The character of Sweeney Todd first appeared in a Victorian penny dreadful titled The String of Pearls.
Sweeney Todd opened on Broadway in 1979 and in the West End in 1980. It won the Tony Award for Best Musical and Olivier Award for Best New Musical. It has been revived in many productions and inspired a film adaptation. The original logo for the musical is a modified version of an advertising image from the 19th century, with the sign replaced by a straight razor. There is also a woman wearing a blood-stained dress and holding a rolling pin next to the man.