The ‘Devil Wears Prada’ star plays the character of doomed prostitute Fantine in the film adaptation of the hit stage musical, which is set in 19th Century France.
Hathaway, who also chopped off her long locks for the part, cut out treats from her diet to lose weight for her scenes revealed that the side effect of her eating overhaul was annoying.
“I''m doing some crazy weight stuff right now... I''m on day six of detox... this diet makes me break out, so I love that. Nothing like living on hummus and radishes and then being all like ''And I got a pimple'', Yeah,” she said.