After seeing Kylie Jenner navigate childhood and her teen years on Keeping Up With the Kardashians for all those years, it's hard to believe that she's already an adult - and a mom of two! And now, she's getting ready to celebrate another milestone.

Jenner will be turning 28 on August 10, and with her birthday weekend in her sights, she shared a new bikini photo on Instagram in honor of her "last birthday as a 27-year-old."

In the photo, the Kylie Cosmetics guru is posing in a black bikini top with a glass of red wine in her hand... and can I just point out that she appears to be having an exceptionally good hair day?

See Kylie Jenner's new bikini photo here .

Unsurprisingly, so many people are hitting the comments of Jenner's post to hype her up, because there's no denying it:

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