is a 2007 musical-thriller and the film adaptation of Stephen Sondheim and Hugh Wheeler's award-winning 1979 stage musical. It re-tells the Victorian melodramatic tale of Sweeney Todd, a fictitious English barber who, driven insane by the loss of his wife and daughter, murders his customers with a cut-throat razor, and with the help of his accomplice, Mrs. Lovett, turns their remains into meat pies. Having been struck by the cinematic qualities of Sondheim's musical while still a student, director Tim Burton had entertained the notion of a film version since the early 1980s. However, it was not until 2006 that he had the opportunity to realize this ambition, when DreamWorks announced his appointment as replacement for director Sam Mendes, who had been working on such an adaptation. Sondheim, although not directly involved, was extensively consulted during the film's production.

It stars Johnny Depp as Sweeney Todd and Helena Bonham Carter as Mrs. Nellie Lovett. Depp, not known for his singing, took lessons in preparation for his role, which producer Richard D. Zanuck acknowledged was something of a gamble. However, Depp's vocal performance, despite being criticized as lacking certain musical qualities, was generally thought by critics to suit the part. Sweeney Todd: The Demon Barber of Fleet Street was released in the United States on December 21, 2007, and in the United Kingdom on January 25, 2008, to largely enthusiastic reviews. However, Warner Bros.'s decision not to advertise the film as a musical led to complaints from some cinema-goers, who felt they had been deliberately misled.

The film won a number of awards, including the Golden Globe Award for Best Motion Picture - Musical or Comedy, the Golden Globe Award for Best Actor - Motion Picture Musical or Comedy, and the Academy Award for Best Art Direction. Although not an outstanding financial success in the United States, it performed well worldwide, and has spawned a soundtrack album and various DVD releases. The film received a "Restricted" rating from the MPAA for "graphic bloody violence".