Zac Efron, Taylor Schilling bonds on new film's set

Zac Efron has reportedly been spending a lot of time with his co-star Taylor Schilling.

The two are shooting for their new film The Lucky One in New Orleans.

Rumors of a romance began this week after Star magazine reported that newly single Efron had "instant chemistry" with the 26-year-old Schilling.

But, according to E! Online, the actors' bond hasn't turned romantic - yet - though they have gotten "chummy."

"They joke around, eat together sometimes, run lines. Nothing out of the ordinary," the New York Daily News quoted a source from the set assaying.