It has been years since Jennifer Aniston and Brad Pitt split, but their failed marriage seems to be one that's hard to forget, and the elements of their crumbled relationship still make it to tabloids every once in a while.

It has been rumored that Jennifer Aniston and Brad Pitt drifted apart because of their conflicting schedules and alleged disagreements about having kids. It has also been speculated that the final straw that crushed their marriage was Brad Pitt's attraction to Angelina Jolie at the set of 2005 movie "Mr. & Mrs. Smith."

However, new rumors claimed that Brad Pitt allegedly wasn't the one who first cheated on his then wife - it was purportedly the other way around.

And the person who purportedly started the rift in Jennifer Aniston and Brad Pitt? Jennifer's "Friends" co-star, Matt LeBlanc, allegedly.

It could be recalled that Jennifer Aniston's character, Rachel Green, and Matt LeBlanc's character, Joey Tribbiani, developed a relationship near the end of the sitcom's 10-year run. According to Star magazine, the pair's on-screen romance purportedly continued off-screen despite Jennifer being married to Brad Pitt back then.

Star named Matt LeBlanc's father, Paul, as their informant regarding the claim.

"He even had a relationship with one of of the girls... Jen," Paul purportedly told the magazine. "They would make out in the dressing rooms. he told me about it - it was when she was married to Brad Pitt."

However, Jennifer Aniston's camp denied the rumor right away.

"I have commented in the National Enquirer and others. It's 100 percent false," Jennifer's representative said, as quoted by In Touch magazine. "Jennifer has never had a romantic or sexual relationship with Matt LeBlanc."

Brad Pitt and Matt LeBlanc remained mum about the issue.

News.com.au recounted that Jennifer Aniston was married to Brad Pitt from 2000 to 2005, while Matt LeBlanc was with former wife Melissa McKnight from 1997 to 2006.