THROWBACK photos of Sam Champion and Heather O'Rourke have resurfaced and a fan has pointed out a big difference in Sam's look.

The old pics grabbed the attention of the GMA weatherman after a fan account shared the snaps via Twitter on Wednesday.

The two ABC colleagues were in side-by-side photos that dated back to 10 years ago.

Both TV stars had the same noticeable change in appearance since 2003 - their hair.

Heather was rocking her dirty-blonde hair in the throwback photo but has since dyed her locks and become a brunette.

Sam's hair, on the other hand, turned a lighter shade.

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The meteorologist also had dirty-blond hair in 2003, but it has since turned white and grown out a bit.

While Sam's hair is usually camera-ready for the GMA stage, fans got to see his untamed locks in a BeReal snap last month.

One fan noticed Sam's stark contrast in the throwback pic, commenting: "He looks the same just different hair color," followed by some heart smiley face emojis.

Sam retweeted these snaps of him and Heather and said: "Wow. Look at YOU," referring to his colleague.

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He also admitted that he does "look exactly the same."

Two days before the throwback fun, Heather played a joke on Sam.

She posted a side-by-side photo of Sam and Barney Rubble from The Flintstones.

Heather wrote in the tweet: "Sammy Rubble?" and tagged Sam and colleague Robin Roberts.

Fans ate it up, filling the comment section with laughing face emojis.

"He's about as old too," a fan quipped about the 61-year-old weatherman.

"Priceless beyond words!!" another fan exclaimed.

A third wrote: "OMG love it!!!!!!!"

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"Does have a very close resemblance to Sam Champion," one admitted.

Sam seems to like reminiscing as he recently shared another unrecognizable photo of himself from the 1990s.

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