The actress shared a photo on Instagram Friday to celebrate Ava's 17th birthday, posting a snap of her daughter smiling next to a vase of pink flowers.
"Can't believe my baby is 17 today!" Witherspoon captioned the shot. "I love you, @avaphillippe. Your gorgeous heart and loving spirit never cease to amaze me! I'm so lucky the universe let me be your mother," she added, adding the hashtags #HBD and #17DancingQueen.
A photo posted by Reese Witherspoon (@reesewitherspoon) on
If you thought that was Witherspoon in the photo, you're not alone- Ava and her mom are practically twins!
Along with Ava, whose dad is Witherspoon's ex-husband Ryan Phillippe, the actress is also mom to son Deacon, 12, with Phillippe and son Tennessee, 3, with current husband Jim Toth.