Credit: Photo via Instagram Photo: Ariana Graduates Elementary School

Kim Zolciak is one proud mama! Brielle may be struggling with her grades, but her other daughter is a little Einstein. The former Real Housewives of Atlanta cast member and current Don't Be Tardy star posted a picture of her youngest girl, Ariana, on May 23, the day of her elementary school graduation. She looks so grown-up!

"My sweet angel @arianazolciak is graduating 5th grade today!!!! Straight A's all year! We are soooo proud of you sweetheart!!"

We're pretty impressed with Ariana's straight-A record, but even more impressed with her adorbz outfit. Her pink girly-girl dress looks so cute on her and is appropriately dressed down with a sleeveless pink jean jacket and high-top combat boots. We love her youthful style!

Also, is that one of Kim's wigs she's wearing? Because those locks look picture-perfect. We think Kim should model one of her own wigs after her daughter's hair: The Ariana!

Are you surprised this young lady is bound for middle school already? Sound off below!