In March, producer Richard Zanuck said:
http://comingsoon.net/news/movienews.php?id=18305Producer Richard Zanuck is developing the big screen version of Stephen Sondheim's acclaimed Sweeney Todd. Zanuck calls the Tim Burton-directed film a "horror musical," which like the stage production will be mostly sung. "And everyone in it will be doing their own singing, including Sacha Baron Cohen," who plays a rival barber to Johnny Depp's Sweeney. John Logan (Gladiator, The Last Samurai) has written the script, and the film will be produced entirely at London's Pinewood Studios early this year.