Kylie Jenner is celebrating her last few days as a 28-year-old in a stylish little black bikini top.

The makeup mogul took to Instagram Friday to model a chic black tie-front bikini top and low-rider leggings while staring down the camera — and simultaneously sipping a glass of red wine.

In a steamy selfie, she shared a closeup of the bombshell look, and in several other snaps, she tousled her own hair with perfectly manicured French tip nails — all while clutching her half-full wine glass.

Kylie Jenner in a black bikini top selfie.
Kylie Jenner celebrated her last few days as a 28-year-old in a tiny black bikini top.Kylie Jenner/Instagram

Kylie Jenner with a glass of wine in a bikini top.
In a collection of Instagram photos, the Khy founder also rocked a pair of low rise leggings.Kylie Jenner/Instagram

Kylie Jenner with a glass of wine outdoors.
The mom of two clutched a glass of wine while modeling the steamy look.Kylie Jenner/Instagram
A final pic showed three elegant crystal wine glasses on a table, all filled with a small portion of red wine.

“Last friday as a 27 year old,” Kylie — who has an eye-popping new swimwear line with Frankie’s Bikinis — captioned the weekend pics.

BFF Hailey Bieber hit the “like” button and commented, “28 is better I promise.”

Fans also took to the comments thread with pre-birthday wishes and compliments. “The most Leo Leo of our time ♥️♥️♥️” wrote a follower, while another remarked, “thriving!!”

Kylie Jenner with a glass of red wine.
Jenner has a new swimwear line with Frankie’s Bikinis.Kylie Jenner/Instagram

Kylie Jenner in a black bikini top.
“Last friday as a 27 year old,” she captioned the photos.Kylie Jenner/Instagram

Kylie Jenner's pink Miu Miu bag on Instagram Stories.
She also shared pics of her first few gifts — including a pink Miu Miu bag.Kylie Jenner/Instagram
A third chimed in with, “It only gets better 😍🥰” while a fourth person wrote, “Happy early birthday 😂🖤”

Others delivered a snarky word of warning. “Well Kylie, you’re basically 30 😂 looking good hun!” joked a fan, while another reassured her, “Almost 28 never looked better!!!!👏🔥❤️”

The youngest member of the Kar Jenner clan — and mom of two — is set to mark her 28th birthday on Sunday.

A poker table with a red gift bow.
Mom Kris Jenner gifted Kylie a casino style poker table.Kylie Jenner/Instagram

Playing cards with pics of the Kardashians and Jenners.
The custom playing cards and chips featured members of the famous family.Kylie Jenner/Instagram

Kylie Jenner in a neon green bikini.
Kylie — seen here in a previous photo — turns 28 on Sunday.Instagram/kyliejenner
Via Instagram Stories, the Kylie Cosmetics founder gave a sneak peek at the lead up to the big day — including a pic of a pink Miu Miu handbag. “ahhhh best birthday ever,” she wrote atop the pic. “Thank you @miumiu.”

A casino style poker table with a huge red bow — and custom playing cards and chips featuring members of the famous family — was mom Kris Jenner’s gift.

“Best birthday gift ever!!!!” Kylie wrote atop the pic, tagging the Momager.

And in a gift to fans, Kylie shared that minis of her Cosmic fragrance are back in honor of her birthday. “Mini cosmic is back this weekend for my bdayyy” she wrote atop a Kylie Cosmetics clip of a pink-clad mini Kylie Jenner doll applying the perfume.