"Happy Birthday to my angel @arianabiermann 17 on the 17th!!" the former Real Housewives of Atlanta star wrote on Instagram, along with a slideshow of pics of her and Ariana. "I honestly wonder where the time went!? How has it been 17 yrs? I am so incredibly proud of you Ariana."
Kim went on to re-live some memorable moments from Ariana's childhood, like when she was caught sneaking out of the house on season six of the family's Bravo show Don't Be Tardy....
"You have gone from sneaking out and sneaking sweets to being too damn honest lol and drinking celery juice!" the "Tardy for the Party" singer continued. "All jokes aside THANK YOU for choosing me to me to be your mom! I never knew how we were going to get through our days 17 yrs ago and somehow we managed. You will always be my strength! Love you far beyond words!!!!!!!!"
While Ariana was looking glammed up as usual on her birthday, she swears her look is all natural. Earlier this summer, she blasted followers who accused her of getting lip fillers.
What do you think about Kim celebrating Ariana's 17th birthday with her? Let us know in the comments.