After a year of refusing to officially confirm whether or not they were even dating, the couple reportedly decided to call it quits when Vaughn left last month (SEP06) to begin filming in England.

A source close to Vaughn tells American publication Us Weekly, the couple broke-up the week of 9 September (06) before he left to shoot the holiday comedy JOE CLAUS.

Vaughn told the source on 13 September (06), "It's not common knowledge, but we're not together anymore. We've split up."

Vaughn then added that they solidified the breakup in a long phone conversation.

A friend close to Aniston confirms the two are no longer together adding, "They're 100 per cent done."

The relationship reportedly began to unravel soon after Vaughn proposed to the star 27 June (06) while flying back from a holiday in Mexico.

Sources claim Vaughn was uncomfortable with media attention that the relationship attracted.

The couple co-starred in the hit film THE BREAK-UP last year (05), and were first spotted kissing at a wrap party for the movie in August 2005 in Chicago, Illinois.

Source: WENN