Kim Kardashian Makes First Post-Baby Appearance at Kris Jenner's Flashy Christmas Eve Bash

The reality TV star partied it up for the first time since giving birth to her second child.

No time like Christmas to reappear!

Not only is Kim Kardashian getting her pre-baby body back -- she's already lost 17 pounds since giving birth to her second child, Saint West, with husband Kanye West earlier this month -- but she's back to partying it up, too!

While we're still awaiting Saint's formal social media debut, the 35-year-old reality star made her first post-baby event appearance on Thursday at Kris Jenner’s glamorous (and very flashy!) Christmas Eve bash, a party that Kris dubbed the "best night ever" on Instagram.

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Kim and her 2-year-old daughter, North, rocked matching pigtail braids for the festive soiree held at Kris' home in Calabasas, California.

Caitlyn Jenner was also in attendance, showing off her toned legs in a long-sleeved black dress with a thigh-high slit while posing with family pal, Sarah Howard.

Khloe Kardashian was dressed head to toe in sparkles, opting for a silver jumpsuit that was custom-made for her by Michael Costello.

She later shared cute photo booth pics of her and her "little elves," friends Jonathan Cheban and Malika Haqq.

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Though she didn't share any photos to her own account, Kendall Jenner was there, too, making an appearance in many of the photo booth pics from the night, including those shared by her big sister, Kourtney Kardashian.

Kylie Jenner also shared a series of snaps from inside the party to her Instagram, including one with an epic photobomb by rapper Drake.

The 18-year-old makeup maven pulled out all the stops for the bash, wearing a sparkly emerald green Balmain dress gifted to her by the label's creative director, Olivier Rousteing. "Most beautiful christmas gift ever!" she captioned a photo of herself in the head-turning frock.

Momager Kris also rocked Balmain. "Like mother like daughter," Kylie captioned a pic of the glitzy mother-daughter duo that was later reposted by her 60-year-old mom with the hashtags "#partytime" and "#family."

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Of course, it wouldn't be a party if Kylie didn't document the night on Snapchat:

On Christmas Day, Caitlyn received some even more exciting news -- she's expecting another grandchild! Find out who's pregnant in the video below.

WATCH: Caitlyn Jenner Is Getting Another Grandchild