It looks like there was more to Jennifer Aniston and Brad Pitt's separation than what we know. There is a new rumor that suggests the Hollywood actress might have cheated on her ex-husband Brad Pitt with her Friends co-star Matt LeBlanc over a decade ago.

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According to Britain's Heat World on Thursday, LeBlanc's father Paul LeBlanc suggested in a new interview that his son had an affair with the brunette beauty.

He said, "Matt even had a relationship with one of the girls... Jen. They would make out in the dressing rooms. He told me about it. It was when she was married to Brad Pitt....Matt goes after dirt bags."

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The senior LeBlanc even dished on their Friends co-stars Matthew Perry, David Schwimmer and Lisa Kudrow.

He said, "Matt always said Matthew Perry is an a-hole. He wanted to pound on him a couple of times. David Schwimmer was kind of dry, a bit too serious but Matt always liked Lisa Kudrow."

And as far as Matt's future in Hollywood, his father isn't too hopeful about any future prospects or roles.

LeBlanc's father explained, "He was as good looking as anyone in Hollywood. But he isn't going to age well. It's the high life - I'll see him with his gut hanging over his belt. He's not someone who keeps himself toned when he's not in front of the cameras."

So far, neither Aniston nor Matt have made any comments about the interview.