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They Grow Up So Fast! Reese Witherspoon Wishes Daughter Ava a Happy 18th Birthday with Sweet Instagram Post

People logo People 9/9/2017 Maria Pasquini
  © Latour/Variety/REX/Shutterstock  

They grow up so fast!

On Saturday, Reese Witherspoon wished her lookalike daughter Ava Phillippe a happy 18th birthday in an touching Instagram post.

“Happy 18th Birthday to my sweet girl,” Witherspoon wrote. “Your kindness, grace, intelligence and humor never cease to amaze me. I love you and your huge heart and I feel so lucky that I get to be your mom.”

Phillippe is every bit as gorgeous as her mother and much has been made about their family resemblance — especially when they post pictures wearing similar outfits.

While Witherspoon and Phillippe may look like sisters, many people also apparently think the teen’s father (and Witherspoon’s ex) Ryan Phillippe is her brother.

“My daughter gets embarrassed sometimes by the fact that I do look so young and I get mistaken for her brother sometimes,” the actor said during an appearance on The Late Late Show withJames Cordenlast year. “Which repulses her! Like, absolutely repulses her that anyone could mistake me for her brother.”

Celeb kids who are gearing up for their first day of school:

SHAYA: <p>"Bye-bye summer! 1st day of school on my way 2 pick up my babies, so excited!" wrote Brooke Burke-Charvet. "Not sure who had a harder time separating today me or them."</p> It's That Time of Year Again! Celeb Kids Who Are Gearing Up for Their First Day of School

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