Mistakes
At the end of the song "Wait," when Sweeney and Lovett hear Anthony running up the stairs, Sweeney runs behind the door to his shop. For a quarter second, as Sweeney places his back against the wall, there is a modern-day water bottle on the window ledge. This, however, cannot be seen on the dvd or xbox, though on laptops and probably computers also, you can see it around 1:13:10. See more...
Trivia
During its first month of production in London, Johnny Depp had to take a ten-day leave of absence when his daughter, Lily-Rose, was rushed to a hospital due to a severe illness (which was never disclosed by the media). To accommodate his absence, director Tim Burton filmed scenes that didn't feature Depp's character. See more...
Movie Mistakes blog
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Other great sites
Sweeney Todd (2007)
Directed by Tim Burton, starring Alan Rickman, Helena Bonham Carter, Johnny Depp, Sacha Baron Cohen, Timothy Spall (add more)