The new extended trailer for Tom Hooper's film gives fans a glimpse at the hard work that went into this adaptation: namely, having the stars of the movie sing live while shooting. This would be different from all other movie musicals, which usually have the cast perform their songs in a studio months before production, then lip-synch when they start filming. As actor Eddie Redmayne explains, "The problem with that is you have to make all your acting choices three months before you've even met the actor you're working with."
So how did Hooper -- who won an Oscar for "The King's Speech -- manage to pull this off? By giving an earpiece to each of the actors during shooting and then having a pianist on set play the background music.
In the clip, which you can watch above, audiences get to see/hear Hugh Jackman belt out Jean Valjean's opening lines right on set, and Amanda Seyfried's Cosette profess her love in song form right on camera. Paging Oscar!
"Les Miserables," starring Jackman, Hathaway, Seyfried, Russell Crowe, Eddie Redmayne and Helena Bonham Carter, will hit theaters on Christmas Day.