Vince Vaughn has dumped Jennifer Aniston, according to US reports.

The couple met on the set of romantic comedy 'The Break-Up' but cracks soon started to appear in their relationship, with the pair constantly arguing over Vince's bachelor lifestyle.

The Hollywood funnyman is currently in London filming Christmas comedy 'Joe Clause' and before he flew to the UK he and Jennifer decided to call time on their romance.

He called it a day with Aniston in an emotional phone call at the beginning of September and cancelled plans for Jennifer, 37, to visit him in the city, US Weekly magazine reports.

"It's not common knowledge, but we're not together anymore. We've split up," Vaughn, 36, allegedly told an insider at the magazine.

A source close to Jennifer confirmed: "They're 100 percent done."

The split comes despite Vaughn asking Aniston to marry him back in June.

Vaughn bought Aniston a stunning £300,000 9.5-carat canary yellow diamond. And after a nine-day holiday in Mexico, presented her the ring on a private jet flight back to Los Angeles.

The magazine says that Vaughn had been put off marrying Aniston after getting a glimpse of what life with her would be like.

"Vince eventually saw how needy she is, and it scared him off," a friend told the magazine.

"Jen lives in a crazy world with all the media. It's just not his thing," another pal said.

But don't expect Vaughn to call Aniston's ex Brad Pitt to commiserate.

"Vince thinks Brad is a horse's ass," another friend said.

But the feeling is not mutual. "Brad actually thought Vince was a good guy and liked him when they worked together," a source close to Pitt said.

"He totally understands what Vince is going through with her. Jen is just incredibly needy and controlling and made his life hell.

"It was more of a 'Good luck, buddy' attitude. Brad doesn't care at this point. But, of course, this is something he would expect - he was in the same trap."

The breakdown of Aniston's latest relationship, has hit her hard, the magazine says.

"She was over Brad for a long time, but now she is really starting to feel bad about herself," a friend of Aniston's said.

"She feels like she is living in the shadow of her ex and that she is seen as the 'failed rebound girl'."