Anne Hathaway shows off urchin haircut at Stella McCartney show In "Les MIs," she plays Fantine, the French factory worker, who has to sell her hair and become a prostitute. As well as having all her hair cut off for her role in the new film adaptation, reports have suggested the actress was on a 500-calorie a day diet in order to lose weight for her death scene. In a newly released "teaser" trailer for the movie she is seen singing I Dreamed a Dream. The actress famously performed a parody of the song 'On My Own' from Les Miserables when she co-presented the Oscars in 2011. While it made the audience laugh, it probably also secured her the part of tragic French factory worker Fantine in Tom Hooper's forthcoming film adaptation. The actress sings the part herself. The King's Speech filmmaker has described Hathaway's singing as "raw" and "real" when this song was first unveiled at CinemaCon in April. Les Miserables, the world's longest running musical, is due to hit cinemas in December this year.