Anne Hathaway**'s back was front and center in London at the Wednesday Nov. 5 premiere of Les Miserables.

Hitting the red carpet for the epic film musical based on the classic Broadway show, the newlywed star, 30, made a dramatic appearance in a white Givenchy gown featuring pearl details, draped, off-the-shoulder sleeves -- and a rear hemline that completely exposed the actress' back, famously slimmed down from rigorous dieting for the intense role.

"I still feel the stress over 'Am I thin enough? Am I too thin? Is my body the right shape?'" Hathaway admits in the January issue of Glamour. "There's an obsessive quality to it that I thought I would've grown out of by now. It's an ongoing source of shame for me."

To faithfully portray Fantine in Les Miserables -- a prostitute dying of tuberculosis -- Hathaway cut off her famoly long locks and lost a total of 25 pounds via extreme measures.

"I had to be obsessive about it--the idea was to look near death," Hathaway told Vogue. "Looking back on the whole experience--and I don't judge it in any way---it was definitely a little nuts. It was definitely a break with reality, but I think that's who Fantine is anyway."

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This article originally appeared on Usmagazine.com: Wow! Anne Hathaway Wears Sexy Backless, Beaded Dress at Les Miserables London Premiere