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Viewers impressed with Freida Pinto's backside in Immortals are going to be seriously disappointed.

"It wasn't really my butt," the 27-year-old actress -- who has a steamy sex scene with Henry Cavill in the film -- recently admitted to E! News. "It was a butt double. I'm relieved I don't have to deal with that issue."

While the Indian beauty -- who's still dating her Slumdog Millionaire costar Dev Patel, 21 -- managed to stay covered up, her costar Stephen Dorff was less fortunate.

"I had no clothes throughout the whole movie!" the 38-year-old actor told E! News. "I only had this little leather piece [around my neck] for the whole f-cking movie."

Immortals hits theaters Friday.