Reese Witherspoon's Lookalike Daughter Ava Rings in Milestone Birthday: 'Time Flies'

Reese Witherspoon 's eldest child, Ava Phillippe , is officially 25 years old, and the model marked the occasion on social media as she celebrated with friends.

Ava shared some groovy snaps with fans on Sept. 15, six days after her real birthday of Sept. 9. While her mom was at the Emmy Awards, Ava appeared to be partying it up with a bunch of close pals, laughing, smiling and posing together for photos.

"25 called... I told her we're a lil busy right now 🎈✨," she said in the caption. The note referenced Ava's first photo, in which she posed while holding an old corded telephone up to her ear, wearing green-tinted sunglasses and a daisy clip in her hair.

The second snap had Ava wearing bright pink heart-shaped sunglasses surrounded by three friends, as they all matched in white tops. A bunch of streamers hung down behind them.

The rest of the photos featured her friends who celebrated the big day with her, along with a moody picture of her birthday balloons on the ceiling.

Ava's younger brother Deacon joked about the last photo, which showed two balloons of "5" and "2," saying, "This is 52❤️."

A fan who claimed to have worked with Witherspoon on Legally Blonde 2 wrote, "Happy Birthday!! I remember when your mom would bring you to set on LB2, you were about 4-5 yrs old.. time flies! 🎉🎉." Many more also wished her a happy birthday.

On Ava's official birthday, her mother marked the special day with a photo of the two getting a drink together while looking chic, writing, "Happy Birthday to my amazing daughter @avaphillippe who happens to be one of the most genuinely kind-hearted and wise people I know. I love you with all heart 💓Keep shining your beautiful light my sweet girl! ✨."

Witherspoon shares both Ava and Deacon with her first husband, Ryan Phillippe , while she also has a son named Tennessee with ex-husband Jim Toth .

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