From PEOPLE Magazine Click to enlarge
The May 10 wrap party at Miami hot spot Nikki Coconut Grove celebrated the end of one union—the cast and crew working on Marley & Me's Miami shoot—and the beginning of another. Jennifer Aniston and John Mayer arrived hand-in-hand (Jennifer costars with Owen Wilson in the film based on the bestselling book). At the party, a relaxed Jennifer, 39, introduced John, 30, to colleagues. "They were acting very much like a couple," says a source. "At one point, John hopped up on a table and took pictures." The pair also danced to '80s tunes, and later John fed her strawberries. Then, "they did a little kissing at the bar," says an onlooker. "It was really cute!"

The couple's PDA thrust them back into the spotlight, two weeks after they first raised eyebrows with a romantic weekend together in Miami. But their subsequent time spent apart—she continued filming; he worked in New York—fueled speculation that they had split. Not so: The singer has had a standing reservation at Jennifer's Miami hotel for the past several weeks and has spent "quite a bit" of time there, says a source. After spending more time with Jennifer last weekend (then heading off to Orlando May 13, where he played a private corporate concert while she snapped pictures backstage), John is already getting serious about her. "He's been throwing around the term 'love' already," says a pal. "He's fallen hard for Jen. He's pretty enamored."

So is Jennifer (who next travels to Philadelphia for more Marley filming). But for now she's content to take a wait-and-see approach to the relationship. "The thought is, as long as she knows this is just a good time, everything's okay," says a Jennifer source. "And that's just what this is."

  • Contributors:
  • With Lesley Messer,
  • Bryan Alexander,
  • Jennifer Garcia.
This week's cover

On Newsstands Now!

Saved by the Bell Reunion

The hookups, the meltdowns, the memoires

The case reveals what was really going on what they think of each other now!

Get 4 FREE PREVIEW Issues! Click here now