So sweet!
Princess Charlotte Waving
Credit: Max Mumby/Indigo/Getty Images

The royal family sure knows the charm and function of a hand-me-down. Last week, Princess Charlotte wore what appeared to be big brother Prince George's blue sweater while kissing newborn Prince Louis.

WATCH: Raising a Little Princess — All About Charlotte's Amazing Childhood

As it turns out, clothing isn't the only thing the royal posse recycles. According to a new issue of Us Weekly, the princess' toys were once used by her older brother, George. "A lot of Charlotte's toys are hand-me-downs from George. Although she's definitely a girly girl, she also loves to play outside, just like George," a royal family insider tells the magazine. "She's got one of his old scooters and also motorized Jeep she loves to drive around the patio in."

Though the adorable pictures of the new siblings make their strong connection obvious, the insider also shared some positive words about Charlotte and Louis. "She is really enjoying having a younger brother to play with. She's taking her big sister duties very seriously. She won't leave baby Louis' side," said the insider, noting that George also "protective" of his brother and sister.

Happy scooting, young Char!