Julia Roberts posts rare snapshot as twins Hazel and Phinnaeus turn 21

Julia Roberts is celebrating her twins' 21st birthday!

Taking to her Instagram handle on Friday, the 58-year-old actress posted a throwback snap of her daughter Hazel and son Phinnaeus, wishing them a "Happy Birthday."

"These game changers, life alterers, [heart] expanders once were 1 and now are 21! That was fast," the Pretty Woman actress captioned the post.

"Happy Birthday my Dears," she added.

For those unversed, Julia shares the twins with her husband, Danny Moder. The After the Hunt star and the cinematographer are also parents to son Henry.

Recently, in an interview with People magazine, Julia revealed one thing she wants to do now that she's an empty nester.

"I think I'd like to do another play," said the actress

"Now that my kids are out of the house, I think that I could devote that kind of laser focus again to something like that because [that's] such a different kind of commitment to make than a film," added Julia.

That same month, the Notting Hill actress appeared on The Late Show with Stephen Colbert and said that being an "empty nester" will never stop her from being close with her kids.

"It's all fun, honestly," said Julia. "It's also delicious. My kids — I know everyone thinks their kids are great, well... I think my kids are great."

"I love hanging out with them and spending time with them," she added. "Fortunately, we have had lots of visits along the way of this empty nest."