John Mayer celebrated his birthday with ex-girlfriend Jennifer Aniston, fueling rumors they have reconciled.

The pair - who looked intimate and affectionate - were seen together on Wednesday night at the Grand Havana Room members club in Los Angeles enjoying dinner on a private terrace.

A source said: "They seemed to be having a great time. They were sitting next to each other. They're a very good-looking couple and seemed happy together."

Jennifer and John, who split in August after a three-month romance, sparked speculation they had reunited late last week after they were seen passionately kissing at a Ray LaMontagne concert together before sharing a private plane to Los Angeles.

They were then seen enjoying drinks with friends earlier this week, where a fellow reveler said: "They were holding hands at one point and seemed very much back on."

Early on Wednesday, John, 31, was seen "sneaking out" of the 39-year-old former "Friends" star's home.

A source claims the two reconciled because Jennifer "can't deny their major chemistry, similarities and ability to laugh at things."

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