Kylie Jenner rings in 21st birthday with pink-themed LA bash

Kylie Jenner's 21st birthday party was one for the books!

The Kylie Cosmetics mogul celebrated with her family and celebrity friends Thursday in Los Angeles at the luxurious Delilah lounge. And of course, sisters Kim, Khloé, Kourtney Kardashian and Kendall Jenner, along with mum Kris Jenner, turned out in their finest ensembles for the celebratory affair and gave fans a special look inside the exclusive, pink-and-gold-themed fete.

Kylie herself made a show-stopping entrance, debuting a back-grazing platinum ponytail with her hot pink satin dress.

She also shared a photo of herself in a sparkly, curve-hugging bodysuit, which she teamed with blush pumps.

The evening did take on a serious tone when a woman, identified by The Blast as Australian Instagram model Tammy Hembrow, was photographed being carried out of the party, face down, on a stretcher and lifted into an ambulance.

The mum-of two has a working relationship with the Kardashian fam, and shot a Good American fashion campaign with Khloé last year.

Hembrow shared a photo of herself in Beverly Hills, California, with her 8.6 million Instagram the day after the party, looking happy and at ease. A source told The Blast that she had recovered from the previous night.

Back at Kylie's bash, Caitlyn Jenner also made an appearance with rumoured girlfriend Sophia Hutchins, who spent time chatting with Kris and her boyfriend Corey Gamble, per Entertainment Tonight.

Thanks to Kim's Instagram Story, it was clear that Kylie was having great time as she danced along to the pumping music with boyfriend Travis Scott, whom she shares six-month-old daughter Stormi.

Kim's husband Kanye West, who rarely makes public appearances these days, was also on hand and reportedly stayed close to his wife the whole evening.

But he wasn't the only surprise guest to turn out. Kourtney's ex-boyfriend (and father of their three children) Scott Disick was also present and seen dining with Kourtney at a table.

It was even apparent that Kylie had a whimsical pink ball pit, where Kim played gleefully with Khloé.

Fellow celebs including The Weeknd, Cara Delevingne, Bella Hadid, Chris Brown, Dave Chapelle, Justine Skye, and Ashley Benson also toasted Kylie for her big night. But noticeably absent was Kylie's brother Rob Kardashian and Khloé's beau Tristan Thompson.

It did seem as if sisters Kim, Khloé, and Kourtney all got along despite a blowout fight revealed last week on the Season 15 premiere of Keeping Up With the Kardashians, where Kourtney called the family "disgusting" and suggested the relationship with her famous sisters was "fake."