At the charity polo match, Charlotte — sporting a pink dress and matching sunglasses — attempted a somersault while mom Kate Middleton and 4-year-old brother Prince George watched in amusement.
Charlotte's brother and mom also tickled her tummy, watched her attempt a cartwheel and even pulled her back by her dress when she wandered too far.
Kate's only daughter also shared some sweet one-on-one time with her mom, 36.
Charlotte also spent time with the other kids in attendance, including Queen Elizabeth's great-granddaughter, Savannah Phillips, who went viral after covering George's mouth at the Trooping the Colour Parade.
Charlotte can make her own fun, too. She was seen digging through mom Kate's purse, holding a polo mallet and frolicking in the grass.
Here's some of Charlotte's cutest moments from the royal wedding: