Kylie Jenner Flaunts Her Abs With Stassie Karanikolaou In Matching Outfits

Kylie Jenner goes matchy-matchy with Stassie Karanikolaou!

The Kylie Cosmetics founder took to Instagram and shared a series of snaps featuring her longtime best friend.

Kylie, 27, showed off her chiseled abs in a striking yellow cropped tank top and joggers. As for Stassie, 27, she sported the same attire but in different colors -- a white top and light gray bottoms.

The duo looked like twins as they struck a pose outdoors. Standing in front of a car, Kylie and Stassie flashed peace signs while holding their hoodies.

Kylie completed her outfit with black boots, while Stassie sported brown UGGs. They also accessorized with chic black sunglasses and handbags, though in different styles. As for accessories, the mother of two opted to wear a dainty silver watch.

A swipe to the right showed the best friends lounging on the bed with Kylie hugging Stassie from the back. In the last slide, the reality star flaunted her stunning nails.

Kylie captioned the share: "Travel day w bae."

In less than a day, the post accrued over 1.8 million likes. More than 2,000 followers also took to the comments section and shared their thoughts about the photos.

Several fans have mistaken Stassie for Kylie's sister, Kim Kardashian.

"Thought it's Kim and Kylie until I swiped," One person noted, while another follower wrote, "Hot obsessed hot & obsessssed. I also agree that Stass looks like Kim in this lol."

A third user remarked, "Imagine being that lucky to the point that Kylie Jenner cuddles you while sleeping."

The fourth admirer commented, "Healthy friendship. One in a million."

Kylie and Stassie met in middle school, and they have been inseparable ever since the duo first met in a Barnes & Noble, but it was only during a middle school sleepover that they solidified their friendship.

"We know too much about each other. We're stuck with each other forever," Stassie said in an interview, later joking that she and Kylie are "going to move to a farm together and get married."

Due to their closeness, there have been rumors of Kylie and Stassie "dating," especially after Travis Scott's baby mama shared a photo locking lips with the model on Valentine's Day and called her her "forever Valentine."

In the season 3 finale of Hulu's "The Kardashians," Kylie and Stassie addressed the speculation.

"Isn't it so funny that everyone thinks that we're dating these days?" Kylie said. "When we get a little alcohol in our system, we just like to kiss each other and stuff."

Stassie called the rumors "weird," and Kylie joked that she "wished" she was "sexually attracted" to her best friend, noting that would "have been way easier."