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Demi Moore and Courteney Cox are practically twins and we can't unsee it

The actresses look more than just "Friends" ... they look like twins!
/ Source: TODAY

You might say Demi Moore is one of a kind. You might be wrong.

On Thursday, the actress took to Instagram to share a photo of herself and Courteney Cox, showing just how much they look alike.

“Who’s who,” the “Ghost” star captioned the photo, which featured the dark-haired actresses smiling, rocking glasses, holding bags and tilting their head ever so slightly.

People couldn’t help but notice how much the pair resembled each other.

“Twinsies,” commented one person.

“Are you relatives?” asked someone else.

Glamour Reel Moments - Arrivals
Cox and Moore at an event in Los Angeles in 2008. Do they look alike? You be the judge.Gregg DeGuire / WireImage

“Double take lol,” another person wrote.

It's not the first time people have pointed out Moore and the “Friends” star appear to share similar DNA.

Last year, Cox’s ex-husband, David Arquette, shared a family photo on daughter Coco's first day of high school. Some thought Coco was a ringer for Moore in her "St. Elmo's Fire" days.

“Your girl looks like a young Demi Moore,” one person commented.

“You two cloned Demi Moore with your kiddo,” another wrote.

So, between Moore, Cox and Cox's daughter, maybe we ought to consider them three of a kind.