Kylie Jenner celebrates Youtuber Stassie Karanikolaou’s 27th birthday bash

On Saturday, June 8, the eve of the YouTube star's 27th birthday, Kylie Jenner stepped out to celebrate her best friend in Los Angeles, along with other celebrities including Addison Rae, Rosalía, Tana Mongeau, and Emma Chamberlain. Karanikolaou rocked a tan crochet-style dress for the occasion, while Jenner, 26, wore a white one-shoulder minidress and a black leather jacket. The famous group of friends reportedly went to The Nice Guy, per Hello.

The day after the festive night out, the birthday girl shared a series of pictures and videos from the gathering on her Instagram Stories, including a glimpse of huge cakes decorated with pictures of her. In the social media updates, she sat in a restaurant’s booth and was all smiles as she blew out candles.

Karanikolaou also shared a video on her Instagram grid of a locket with a picture of herself and her mom, along with a recording of her mother's voice singing "Happy Birthday" to her. Her mother died in June 2023, and the locket was an early birthday present.

She also thanked her manager Alexis Fisher for the thoughtful and sentimental present, writing: "@alexisjfisher I can’t even put into words how much I love you thank you for the most special gift 😭."

It's no surprise that Jenner joined Karanikolaou out for her birthday, since the pair are inseparable.

"She's definitely my oldest friend," the reality star said during the season 3 finale of The Kardashians. "We grew up together, we've been through so much together. She's like a sister."

The YouTube personality previously opened up about her bond with Jenner in a 2021 interview with Bustle. "We know too much about each other. We're stuck with each other forever," Karanikolaou said at the time.

She also joked that the duo, who have been friends since they were teenagers, are "going to move to a farm together and get married."