Julia Roberts’ fraternal twins are celebrating a milestone birthday.

Phinnaeus and Hazel turned 21 on Friday, and the Oscar-winning actress commemorated their special day with a throwback photo shared via Instagram .

The adorable tribute showed the siblings as toddlers, enjoying what appears to be a much earlier birthday celebration in their high chairs. Hazel could be seen giving the camera a bright grin, while Phinnaeus gazed at her with a cute, quizzical expression.

“These game changers, life alterers, [heart] expanders once were 1 and now are 21! That was fast,” Roberts, 58, captioned the shot. “Happy Birthday my Dears.”

The comments section buzzed with well-wishes for the twins, including one from actress Ali Wentworth, who wrote, “Happy Birthday to the best!”

Roberts shares he

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