Since the first season of Real Housewives of Atlanta back in 2008, Kim Zolciak-Biermann has been known for her voluminous, blonde tresses. Her signature hairstyle was later revealed to be a wig (RHOA fans might recall the fight when Nene snatched it off her head), and Zolciak-Biermann has just dished her natural hair color with a rather cheeky post on Insta, and guys? It ain’t blonde.

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My snapchat:KimZBiermann Fun Facts: I run 3-4 miles 5x a week I have ALWAYS loved to run. I don't eat red meat or pork NEVER have. I'm 5'8. From the time I get up to the time I go to bed I rarely sit down. I hate breakfast but drink @310nutrition shakes in place of it. I love skincare I have almost every product ever made, when we were building our house We built a special cabinet just for all my products. Hence why I started @kashmerekollections I naturally have black hair but now 95% gray 😩 I have a device in my heart. I breastfed all 6 of my kiddos. I love my teeth (Braces twice) 😬 and my feet ❤️ I have always been able to manifest long before I ever knew what it meant. 📒I wrote in my journal when I was 12 "I wanted my own show by the time I was 30" I started on RHOA at 29. 🎥😬 I have one brother he is 20 months older than me. I love the beach. 🌊 I quit smoking 🚬 years ago after reading "The Easy Way To Quit Smoking" never smoked again. At 18 I went through the windshield of my car (glass came out of my forehead for over 10 yrs) my mom picked piece by piece out of head in the hospital with tweezers. I would squeeze on my forehead (like a pimple) but out would come glass instead for over 10 years. The Only plastic surgery I have EVER had was a tummy tuck/ boob job by the best @dr.hochstein 🔪💉 I eat chocolate everyday 🍪🍩 I love my family more than ANYTHING in this world. I thank God and my angels a million times a day for my incredible blessed life. I don't do elevators, I'd rather walk 30 flights. I'm claustrophobic to an extreme level. I have never had a c section. I have only a couple friends, I married my best friend. I'm almost 8 years older than Kroy 💃🏼 I went to nursing school and graduated. Practiced for a few years🏥 and loved it. I get car sick every time I'm a passenger. I love to gamble. I ASK for what I want, I BELIEVE I already have it, and I RECEIVE it. Im anemic and get iron IV for it often. I worry about my kids 24/7. Im loyal to a fault. I posted this pic because it took 3x to get my ass to look this juicy.

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“I naturally have black hair but now 95 percent gray. :( ” she wrote. Wait, WHAT!? We don’t’ know what’s more shocking — the fact that not only is the reality starlet, 39, not the blonde she’s come to be synonymous with, or the fact that she’s now nearly 100 percent gray to boot! Jaws, dropped.

<> Bravo's "Watch What Happens Live: Andy's New Year's Party" at the Bravo Club House at the Embassy Row Production Offices on December 31, 2010 in New York City.

The Instagram caption also shed light on some pretty crazy things about the mom of six, such as her favorite body parts — her teeth (the product of two stints in braces) and her feet — and a rather scary side effect of a car accident at 18 in which she was thrown through the window (Zolciak says glass remnants remained in her forehead for 10 years).

Kim, it’s like we hardly knew you! Check out pics from her pre-fame, jet black hair days here.

Are you surprised to hear Kim’s real color? Tell us over @BritandCo.

(h/t People; Photos via Frederick M. Brown + John W. Ferguson/Getty)