Inside Kylie Jenner's 21st birthday: Who was and wasn't there?

Kylie Jenner rang in 21 in style.

The beauty mogul was surrounded by her closest family and friends as she turned 21 on Thursday evening with a classic West Hollywood birthday: First, Kylie and the rest of the Kardashian-Jenner family had dinner at celebrity magnet, Craig's, where paparazzi swarmed for a look at the family as they entered the restaurant. After dinner, the crew made its way to celeb haunt, Delilah, where a ton of Kylie's friends were waiting to let loose in honor of the birthday girl.

Of course, the entire thing was documented on social media, which made for some unexpected discoveries about who was there, who wasn't there and who we saw hanging out.

Scott Disick and Kourtney Kardashian sat next to each other during Kylie's birthday dinner at Craig's, which resulted in some tongue-in-cheek commentary by Kourtney's sisters, Kim and Khloe. While the former couple and co-parents tapped away on their iPhones, Khloe wrote that "a girl can dream," implying that she wants them to get back together following Kourt's split from Younes Bendjima. On her own Snapchat, Kim joked that they were acting like an "old married couple." Unfortunately for the Kardashians, Scott appears totally happy in his relationship with Sofia Richie, who was not in attendance.

Later in the night, Khloe hung out with just Scott, which will make "Keeping Up With the Kardashians" fans nostalgic -- the pair has always gotten along famously well and consider each other to be best friends.

See the most notable snaps from inside Kylie Jenner's 21st birthday party:

Also there? Kylie Jenner's dad, Caitlyn Jenner, who famously has a strained relationship with most of the family, though she is seemingly on good terms with her two daughters, Kylie and Kendall. When Kim pointed her phone at Caitlyn during the party at Delilah, she kept an unamused look on her face and Kim notably didn't verbally acknowledge her presence.

A slightly unexpected guest at Kylie's party was French Montana, the rapper who famously dated Khloe from 2013 and into 2014 after her split from Lamar Odom. Kim posted a selfie video with him that made it appear as though he's on good terms with his ex-girlfriend's family.

Bella Hadid and The Weeknd continued to low-key flaunt their rekindled romance on Thursday night, too, as seen in one of Kim's Snapchat videos. Bella could be seen watching the DJ as The Weeknd turned to Kim's phone to pose for her selfie.

Amid engagement rumors, Kris Jenner hung out with Corey Gamble, as well as comedian pal, Dave Chappelle, who got on the mic at one point to sing "Killing Me Softly."

More guests at the party? Travis Scott, Malika Haqq, Jen Atkin, Justine Skye, Jordyn Woods, Simon Huck, Chris Brown, Meek Mill and Larsa Pippen.

Though it feels as though almost everyone in the Kardashian-Jenner orbit was in attendance on Thursday night for the party that lastest well into the morning, there were a couple of notable absences: Khloe's boyfriend and father of her child, Tristan Thompson, was not there, as TMZ reports that he was in Toronto at a fundraiser for epilepsy. Also not there? Brother, Rob Kardashian, who was the only one of Kris Jenner's children not there. Kris told Us Weekly this week that he's doing well and working on his fitness, so it's unclear why he wasn't there.

See Kylie Jenner's sexy birthday outfits: