13:30 11 August 2005
Jennifer Aniston has been photographed kissing Vince Vaughn - further fuelling romance rumours.
The couple were snapped cuddling up in a Chicago park during a break from filming their new movie, 'The Break-Up'.
An onlooker is quoted in Britain's Daily Mirror newspaper as saying: "They seemed very comfortable in each other's company and were quite spontaneous when they hugged."
Another witness told Britain's Daily Mail newspaper: "They were being photographed by a friend on a small pocket camera and they were also taking pictures of themselves.
"Although they appeared to be hamming it up for the camera, there was definitely a frisson of flirtation. They were holding on to each other for much longer than they needed to and they could not stop grinning at each other."
It is the second time pictures of the Hollywood stars looking intimate have been published.
Earlier this year, the pair were pictured cosying up on set - but at the time both denied they were dating.
In the photos, handsome Vince had both his arms wrapped around the former 'Friends' beauty while she had her hands resting on his thighs.
A spokesman for Jennifer, who earlier this year split from Brad Pitt, insists the pair are not romancing.
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