Jennifer Aniston is worried that her alleged romance with Gerard Butler will 'cool' now that filming has wrapped on their movie, The Bounty.

Though they've been seen looking cosy on the New York set of the upcoming upcoming flick, both have denied being anything more than co-stars.

Gerard told reporters at a recent premiere: "Jen and I love it when there's three rumours in a day.

“One day we were dating, we had split up and she was pregnant with John Mayer's baby!"

Still, insiders tell Page Six that Jen “is fearing that things will cool now that they've gone their separate ways.”

The former Friends star is now promoting new movie Love Happens, whilst Gerard is also busy pimping out his new pecs-out actioner, Gamer.

If things do go John Mayer-shaped, we're sure Jen will have no problem locating her next 'hottest thing of the moment'.

Jen's men