Kim Zolciak posts totally topless photo on Instagram

Kim Zolciak-Biermann is letting it all hang out!

The unapologetic "Don't Be Tardy" star took to Instagram on Thursday to celebrate the fact that she has reached 2.5 million followers on Instagram with, naturally, a totally topless photo of herself.

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In the picture, the 39-year-old reality TV maven is shown from behind as she's walking into the ocean in a giant white skirt without a top on. With her hands up in the air and her signature blonde blocks hanging down her back, the star clearly doesn't care who's watching the racy moment.

See the photo -- and more from her vow renewal -- below:

"Hands up🙌🏼 THANK YOU for 2.5 million!!" she captioned the picture. "I appreciate all of you! I loving getting feedback (most of the time) from you guys. You guys keep me up to date with all things I miss. I love reading your comments/stories. Thank you for sharing in this journey (with me) we call 'life.'"

The photo comes from Zolciak's recent wedding vow renewal with husband Kroy Biermann. Along with her six kids, Zolciak had a talked-about photo shoot to honor the occasion. She had previously posted a handful of other photos from the picturesque night.

The Bravo star is no stranger to showing skin on social media, so her latest boundary-pushing post shouldn't come as a surprise to people familiar with the star.

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