Prior to romancing Mila Kunis and having a child with her, Ashton Kutcher was wed to Demi Moore.

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In 2011, Kutcher reportedly cheated on Moore, which Us Weekly reported on that ultimately led to their divorce in 2013.

Thursday night, Andy Cohen's late night show, Watch What Happens Live, had two guests, Jon Cryer, who starred on Two and a Half Men with Kutcher and Scott Eastwood, who is currently promoting his movie The Longest Ride.

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Cryer previously had romantic relations with Moore and was asked by a caller if it was awkward working with Kutcher when he joined the Two and a Half Men cast.

The clip can be viewed below, in which Cryer admitted, "Yeah, it was a little awkward," before discussing how he and Kutcher hashed it out when they first met so they'd be cool working with each other.

That led to Eastwood butting in with, "If it makes you feel any better, he did sleep with one of my ex-girlfriends, but she was my current girlfriend at the time."

Cryer's reaction was "Oh, ouch!"

Cohen then dug deeper on the topic at hand.

"He slept with her while you were together?" Cohen asked for clarity, which Eastwood confirmed.

Eastwood isn't bitter though since he said, "I'd shake his hand," before adding, "I think it was the catalyst that broke him and Demi up."

That prompted Cohen to recall "the girl in San Diego," who Kutcher allegedly slept with and therefore cheated on Moore with.

"Yeah, it was her and her friends," Eastwood stated.

Hollywood Life reported Friday that Kutcher is not happy with Eastwood's bombshell.

"Ashton is livid that Scott would bring up his affair with Sara Leal [Eastwood's ex]," a source dished.

"He cannot comprehend why Scott would chose to do that now, other than the fact he's got a film to sell and needs all the publicity he can get," the source added.

"Ashton himself never confirmed he had an affair, nor did he ever admit that was the reason for his break-up with Demi Moore. For Scott to come out and say that has left him furious because he likes to have his privacy," the source concluded.