TOO CLOSE FOR KUTCH Ashton, Demi, other guy (Photo: Getty Images)

In the heist film (also starring Michael Caine), Moore plays an octogenarian (note: sly trick for looking younger by comparison in real life) and affects a very specific English-American accent. In what sounds like a sitcom version of bring-your-kid-to-work day, the boy who cried Punk'd forged a strong bond with the film's prop master. "It just so happened he was a prankster, too," explained director Michael Radford at the film's premiere in Manhattan. "So the two of them started this battle ... I believe at one point, [Kutcher] had feigned setting the prop gentleman's car on fire. I'm not sure how it all worked, but I know he had enlisted the help of the fire brigade. It was quite elaborate."

Inevitably, the shenanigans turned into a cheese fest, Moore said.

"The prop guy put stinky cheese in a locker that I had to open in a scene," she recounted, "and then keep a straight face. It smelled like something died." (Her dignity, perhaps?) Enter Kutcher, who waged his own fromage revenge. "Put it this way: There was some stinky cheese left in places that I wouldn't have wanted to find," giggles Moore. "After a week, the prop man found cheese zipped inside various places in his jacket. He got what was coming to him."

Finally, the secret of the KutchMoore bond is laid bare.

On a side note, it wouldn't be a Moore affair if babysitter Bruce Willis wasn't lurking in the background with his daughter, Tallulah, arms folded, flicking off reporter questions, and calling them "stupid." When one journo lingered too long, the Die Hard star got physical, rapping and firmly gripping his shoulder in a way that made it clear it was time to step off. He must have been blocking Bruce's view of Demi.