Since the beginning of movie musicals, performers have always pre-recorded their songs and then lip-synched to the recorded track while filming. For the upcoming movie Les Misérables, director Tom Hooper has decided to have the actors sing live on camera, in order to make the film feel as authentic as possible, according to the British paper The Sun. A source said: “Unlike most film musicals, the cast will record their vocals live on camera rather than go into a studio first then mime on film to the pre-recorded vocal. It’s going to be hard work for Sacha (Baron Cohen, who plays Thenardier ) and the rest of the cast. First they have to learn the complex songs, then they’ll have to get it right on set in front of the other stars and crew.” The film also stars Hugh Jackman, Russell Crowe, Anne Hathaway and Helena Bonham Carter and will hit theaters December 7, 2012.