The pair met on the set of new movie Paper Heart and the two actors have been inseparable since, sources tell Star magazine.
An insider, who spotted them during a cosy night out in New York last week (02Oct10), tells the tabloid, “They were very lovey-dovey with each other. When they weren’t kissing, he was making her giggle.”
Stone, 21, has previously dated actor Ryan Findley, while Culkin, 28, counts True Blood star Anna Paquin among his ex-girlfriends.
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