Don't Be Tardy—for the prom!
The sweet 16 beauty already has a serious beau, Collin Lipman, and the new shots could cause DBT and The Real Housewives of Atlanta fans to say, move over, Brielle!
Zolciak's sexy older daughter Brielle has made waves by flaunting her bikini body but so far, Ariana is looking age-appropriate in her roomy gown with long skirt.
Zolciak, 39, posted a picture on Instagram of her daughter stepping down her home's staircase in a white and red flower-patterned prom dress by Sheri Hill.
The mom of six wrote as a caption, "Where does the time go? My sweet @arianabiermann heading to her boyfriends prom! Of course I cried I'm so proud of you @arianabiermann.
"There are no words describe how proud of you we truly are! You are balanced, kind, sweet, giving and patient! Please slow down stay with me forever! We adore you so ❤ we love you too @collinlipman," Zolciak noted to her daughter with football player husband Kroy Biermann.
Another photo Ariana and Lipman posing together. As he's a little older than Ariana, it was his prom time.
Ariana's more high-profile sister, Brielle, recently split from her boyfriend Michael Kopech, as Radar told you first!
The younger girl has been dating Lipman for four months and Zolciak heartily approves, writing online, "my sweet @arianabiermann and her boyfriend @collinlipman she picked a great one."
Ariana has gushed on social media about her love, sharing a slideshow of them together late last year.
"Fair w my boy," she captioned the post.
Ariana recently celebrated her 16th birthday with Lipman at a romantic dinner.
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