Jennifer Aniston has launched a veiled attack on former husband Brad Pitt, insinuating his relationship with Angelina Jolie is a "mistake".

The actress, who split from TROY star Pitt in January (05) and divorced him nine months later (OCT05), is notoriously reluctant to discuss the break-up - which Pitt is rumoured to have initiated after falling for co-star Jolie on the set of Mr And Mrs Smith.

But speaking about new movie DERAILED, in which she has an extra-marital affair with Clive Owen, she vigorously condemns cheating spouses.

The 36-year-old says, "You can have everything wonderful in the world, and you can just make stupid choices because you're bored for a moment or you're not fulfilled for a moment, and you take that time and it affects everything.

"And I think we've all seen someone make a mistake and then try to get out of it instead of nipping it in the bud right off the bat, so that it spirals and spirals down."