Kate Bosworth Blacks Out Her Steamy 21 Love Scene

Kate Bosworth Blacks Out Her Steamy 21 Love Scene
Dave Allocca/Starpix/AP

03/27/2008 AT 03:00 PM EDT

What happened in Vegas? Don't ask Kate Bosworth – she can't remember!

The 25-year-old actress cannot recall shooting her love scene with Jim Sturgess for 21, she told PEOPLE at Wednesday's Cinema Society and Calvin Klein Jeans-sponsored screening of the film in Manhattan.

"We were both so drunk," the Superman Returns star said. "Jim and I became such good friends, we decided to have a couple of drinks, loosen up and go for it."

Surgess – who plays the lead in the shot-on-location casino flick, based on Ben Mezrich's book, Bringing Down the House: The Inside Story of Six MIT Students Who Took Vegas for Millions – has similarly fuzzy recollections.

"We were on Grey Goose, I think," said the British actor. "It was brilliant for about half and an hour. As we continued to drink ... it just became sloppy and messy. I couldn't stand up at one point."

After the screening Wednesday, the two stars headed to SoHo's Mercer Kitchen, where Mary-Kate Olsen, Helena Christensen and Clive Owen joined in for dinner and blackjack.

Unlike in Vegas, everyone was on their best behavior.
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