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After a long day of filming Are We Officially Dating, Zac Efron left the set of his new flick and posed for photos with one lucky (and clingy!) fan in New York City. A few minutes later the 25-year-old actor hailed a cab and took off, but it looks a few more Zefron lovers will be able to snag some one-on-one time with him very soon!

Charitybuzz, an fundraising website, is giving four fans a chance to win a lunch date with the star, along with some time on set. The four winning bidders will also watch a scene being filmed, and they're even allowed to pose for a snapshot with Efron. Proceeds from the auction will support the nonprofit Actors Fund, and this isn't the first time the former High School Musical hottie has worked with the organization. In November, a fan bid $8,500 to meet with Zac, and the cash went to benefit Communities in Schools. "We've had great experiences with Zac in the past," Charitybuzz spokeswoman Glenda Felden said. "He's so philanthropic."