Zac Efron Getting 'Chummy' with 'Lucky One' Co-Star

Zac Efron and Vanessa Hudgens have gone their separate ways, and insist that a third party had nothing to do with their split after 4 years -- but we hear Zac is already getting "chummy" with another gal. A source says he and his Lucky One co-star Taylor Schilling have gotten pretty friendly lately.

He's apparently been leaning on the 26-year-old since the breakup, and though things haven't turned romantic yet -- it sounds like there's some chemistry. "They joke around, eat together sometimes, run lines," said the source (via E! Online ), insisting it's all innocent friendship stuff. "Nothing out of the ordinary," the insider added.

Of course, there's speculation that the "good friends" bit easily turns into something more, but we won't get too ahead of ourselves quite yet. For now, Zac seems to be having fun with Kellan Lutz in New Orleans and has been mingling with the Twilight crew while all parties are in Louisiana.