Reese Witherspoon and Ryan Phillippe’s Daughter, Ava Phillippe, is All Grown Up — Plus See More Celeb Kids Then and Now!

Reese Witherspoon and Ryan Phillippe's daughter, Ava Phillippe, is growing up so fast!

Click through the gallery above to see Harper Beckham, Lily-Rose Depp, Suri Cruise and more of Hollywood's most famous celebrity kids then and now.