New Moon Over Italy

updated 06/15/2009 AT 01:00 AM EDT

originally published 06/15/2009 AT 01:00 AM EDT

Just how scorching hot did it get for stars Robert Pattinson and Kristen Stewart on the set of New Moon in Montepulciano, Italy? "Rob suggested a nude dip in the fountain to Kristen," says a set source. No such luck, Twilight fans—though Pattinson did strip off his shirt as the pair filmed an action sequence in which Stewart's character Bella Swan dashes through a town festival to save vampire Edward Cullen (Pattinson) from the treacherous Volturi vampires. After two months of filming in Vancouver, Ashley Greene was among the lucky costars to head to Italy, where she squeezed in a tour of nearby Siena. "It was just beautiful," she says. "I didn't want to leave."

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