Jennifer Aniston has slammed reports she burst into tears on the set of her new movie because she was thinking about her ex-husband Brad Pitt.

The actress was alleged to have become weepy while filming The Bounty with co-star Gerard Butler earlier this month after a scene reminded her of her former partner.

A source tells New York Post's gossip column PageSix that the actress admitted to her assistant, "I need a moment. This scene reminds me of Brad and me."

The insider added, "While she enjoyed flirting with Gerard on set and put a brave face on every day, privately she is still very fragile."

But a representative for Aniston has vehemently denied the allegations, branding them "ridiculous" and adding, "It never happened."

The former Friends star split with Pitt in 2005. She has dated other Hollywood stars including Vince Vaughn and John Mayer, while her ex is now in a longterm relationship with Angelina Jolie.