Happy Birthday Ava Phillipie!

The daughter of actors Reese Withersppon and Ryan Phillippe turned 21 on September 9.

Her parents first met at Reese’s 21st birthday party back in 1997 and starred together in the hit film Cruel Intentions the following year. They married on June 5, 1999, in a small ceremony at Old Wide Awake Plantation near Charleston, South Carolina, when the actress was six months pregnant.

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The Legally Blonde actress marked her daughter’s milestone birthday with a sweet message on Instagram.

“Wow! How is it possible that this little girl is now 21 years old? Happy Birthday to my sweet girl who has become the most incredible young woman. 💫” the 44-year-old wrote alongside two photos of her first born, one recent shot and another of Ava as a toddler.

“Her kindness, her compassion, and her huge heart never cease to amaze me,” the caption continued. “Ava, there aren’t enough words to describe how proud I am of everything you’ve already accomplished. I cannot wait to see ALL the Good you will put into this world. I love you so much @avaphillippe 💗”

Although Ava, who has two younger brothers, Deacon, 16, and Tennessee, 7, isn’t following in mom’s Hollywood footsteps, fans can’t stop drawing comparisons between the look-alike blondes.

Scroll through the gallery below to check out 21 photos of Ava and her mom totally twinning.

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