The 23-year-old stunner shared an intimate dinner with Zac Efron on Tuesday night at Pace, an upscale restaurant in Los Angeles' woodsy Laurel Canyon neighborhood, Celebuzz can exclusively report.

A fellow diner revealed, "They were very friendly and their faces were close when they talked."

It's no secret that the Transformers 2 actress has had a thing for the 21-year-old High School Musical heartthrob for quite some time. As we reported back in January, the two flirted at the Golden Globe Awards, raising eyebrows at an after-party.

Megan has even said, "What you don't know is that Zac and I are the same person. It's like Janet and Michael [Jackson], we are the same person."

Was this just a dinner between two mega-hot friends? Or something more complicated?

It could be much trickier for him than for her.

Megan, for one, insists that she's absolutely unattached, while rumors continue to swirl that the undeniably sexy actress is dating co-star Shia LaBeouf or possibly still together with ex-fiance Brian Austin Green.

Zac, on the other hand, is pretty serious with long-time girlfriend Vanessa Hudgens.

So what exactly is going on here? Share your thoughts in the comments section!