Then, Tuesday night on Manhattan's Upper East Side, the Hangover star, 34, was seen with Renée Zellweger, 40, at the Italian restaurant Antonucci.
"She didn't really eat much, but he ate," someone in the restaurant told PEOPLE, adding that the two looked like they were on a date. "They were very flirty. Either he's being very gentlemanly, 'cause that's the way he is, or they're dating. He paid. He pulled out her chair, that kind of stuff."
As for their time together, "She had a coughing fit at one point and got up and left, but then came right back," said the source.
Zellweger's rep has no comment. But a source close to the Cold Mountain Oscar winner says, "They did New in Town together and they stayed friends. That's it." And, a source close to Aniston tells PEOPLE, "She and Bradley are still talking."
Reporting by MARK DAGOSTINO