She wished Ava a happy 22nd birthday.

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Ava Phillippe turned 22 and for over two decades, fans have been floored by just how much she looks like her mom, Reese Witherspoon. The shock and awe continued today when Witherspoon shared a photo to celebrate Ava's big day, proving again that her daughter is basically a carbon copy.

"Happy Birthday to my sweet little girl…excuse me… I mean my adult daughter!!! Words can't describe how proud I am of you. You have grown into an extraordinary person who cares so much about the world around her. I am so lucky to have you light up my life. I love you, Ava!!"

Witherspoon posted a throwback photo on Instagram which showed Ava smashing a cake and wearing a pointy party hat emblazoned with the words "party princess."

"This person is turning 22 today…" Witherspoon wrote alongside the black-and-white photo. And yes, even as a baby, the resemblance is the same.

Witherspoon shares two children, Ava and Deacon, with her ex-husband, Ryan Phillippe. She also has a son, Tennessee, with her current husband, Jim Toth.

In an interview with Tracee Ellis Ross, Witherspoon opened up about her relationship with her children, saying that she didn't expect them to have such a close bond and that she knows that it's very special and something she cherishes.

"I never expected the kind of relationship that I have with them, but it's so rewarding to be able to have kids that you can process life with a little bit, and they help me understand the complexities of what it means to be a human now," Witherspoon told Ross. "So I'm really, really grateful that these little humans are in my life," she added. "Adult humans. I have two adult children now, Tracee. It's crazy."