Kylie Jenner kisses her best friend Anastasia Karanikolaou in matching outfits: “Forever Valentine”

Kylie Jenner/Instagram

Kylie Jenner and her longtime friend Anastasia “Stassie” Karanikolaou have just taken their friendship to a new level.

In Instagram photos shared by the Kylie Cosmetics founder on Tuesday in honor of Valentine's Day, the two can be seen wearing matching outfits and sharing a cheeky kiss.

In the first snaps on the carousel, taken on a basketball court, Jenner, 25, and Karanikolaou, also 25, a social media model and influencer, pose as if sharing a secret.

Kylie Jenner/Instagram

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The third photo shows the best friends cuddling while Jenner kisses Karanikolaou on the forehead and looks away shyly.

The Kardashian The star and mother of two then kisses Karanikolaou very firmly, which can be seen on the fourth slide.

In the last picture, the duo seems to be laughing about the intimate moment.

For the sporty photoshoot, Jenner wore an oversized motorcycle jacket with padded sleeves, a black crop top, dark wash baggy jeans, and sneakers. Karanikolaou paired it with a racing jacket, a gray T-shirt, ripped jeans, and white shoes.

“Forever Valentine's Day ♾️,” Jenner captioned the post, to which Karanikolaou replied, “Forever and then some,” alongside a rose emoji.

RELATED: Stassie Karanikolaou on her longtime best friend Kylie Jenner: 'We're stuck together forever'

Kylie Jenner/Instagram

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Karanikolaou has been featured many times on Jenner's social media and is a well-known member of the reality TV star's inner circle. In fact, the two have a friendship that stretches back over a decade.

In a 2021 interview with Bustle, Karanikolaou revealed that she and Jenner first met at Barnes & Noble and then solidified their connection at a middle school pajama party.

Kylie Jenner/Instagram

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“We know too much about each other. We are bound together forever,” Karanikolaou said, later joking that she and Jenner “are going to move to a farm together and get married.”

She went on to talk about how she relies on the support of friends like Jenner because of her family situation.

“My mother suffers from addiction, so that was a big deal. We have a very distant relationship. I've seen her maybe a couple of times in the last couple of years,” she explained, adding that her father worked 16-hour days as a gaffer during her childhood.