Every Photo from the Kardashian-West-Jenner Christmas Eve Party

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Let's start with the decor! It was Kourtney Kardashian's turn to host the annual Kardashian-Jenner Christmas (or should we say Krismas) Eve bash, and the eldest Kardashian sister did not disappoint.

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She transformed her home into a Winter Wonderland for the occasion.

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Kim Kardashian gushed over her sister, Kourtney, and her party-throwing skills. "So homey and beautiful," she said as she showed off the decor on her Instagram stories.

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Kourtney's tree was anything but traditional—it was flipped upside down!

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Kris Jenner contributed to the party by bringing along some lemon cake.

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Kourtney hired carolers to serenade the guests as they entered her home.

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The Poosh founder thought of everything! She even included an Elf on the Shelf for guests to pose with.

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Even Santa got an invite, as evidenced by Kardashian-Jenner pal and hair stylist, Jen Atkin.

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Kourtney wrote Santa a note, asking for "a mountain house and New England sheep dog, so much happiness and extra love."

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The event included a special performance by Sia, who belted her song "Chandelier" for the crowd.

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Kourtney's daughter, Penelope, got dressed to the nines for the occasion in a black gown, while her mom rocked a red dress.

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Kourtney's eldest, Mason, looked handsome in a suit next to his Aunt Kylie.

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Speaking of Kylie, Miss Jenner looked festive in head-to-toe emerald.

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And wore an impressive emerald necklace to match her look.

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Kylie posed with her daughter, Stormi, who matched her mama in a custom-made Ralph & Russo gown.

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Kylie Jenner Stormi — Kylie Jenner/Instagram

The 22-year-old also shared this sweet photo of the pair snuggled up in the event's photobooth.

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Khloe Kardashian — Kylie Jenner/Instagram

Khloé Kardashian—whose ex, Tristan Thompson, was also at the bash—wore a sequined gown and sleek bob.

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Khloe Kardashian True Thompson — Khloe Kardashian/Instagram

She matched her daughter, True Thompson, who wore a gold, ruffled dress.

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True looked like a little princess, accessorizing with a bow in her hair and diamond necklace.

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Kendall Jenner wore a very '90s gown to the festivities.

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And took a quick selfie at her big sister Kim's house before heading to the party at Kourtney's.

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Even Rob Kardashian showed up for the event. His big sister Kim teased that he could marry Sia, who performed at the event, in order to turn her into a Kardashian.

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Tristan Thompson/Instagram — Tristan Thompson

Rob wasn't the only surprise guest of the evening. Khloé's ex and father to her daughter, True, was in attendance. Tristan Thompson posted a photo of himself inside the event's photobooth.

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Scott Disick looked dapper for the occasion.

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Sofia Richie looked sleek and elegant in a silk, one-shoulder dress.

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Rocking a high ponytail and simple diamond necklace, Richie added a jacket to her look and wished her Instagram followers a "Merry Christmas!"

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Sister selfies! Kim, Kylie and Khloé pose for a few quick selfies while watching Sia perform!

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What are the holidays without family?

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Kim posed for a selfie with her sister, Kourtney, who hosted the massive event.

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Kim Kardashian — Chris Appleton/Instagram

Kim rocked an off-the-shoulder, alligator skin gown and posed with hair stylist to the stars, Chris Appleton.

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Kim Kardashian Kanye West family Christmas — Kim Kardashian and Kanye West with family. Kim Kardashian/Instagram

Her family coordinated their looks, with North wearing a pink pantsuit that matched Kim's gown, and the three younger Kardashian West children rocking velvet outfits like their dad, Kanye West's.

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Saint West added a silk, button down shirt to his velvet 'fit.

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It looks like Chicago wasn't feeling the family photos, though she looked adorable in a purple velvet jumpsuit.

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Kathy Griffin was there for the festivities!

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Kim's son, Saint, sat on his dad's shoulders to get a better view of the performers.

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And danced the night away with a big smile on his face.

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Kardashian Christmas — Jen Atkins/Instagram

"You put the party in party," Jen Atkin wrote of this year's host, Kourtney Kardashian.

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Atkin also took a quick Instagram video with Khloé, her "little bunny."

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Kris Jenner and Kim Kardashian — Kim Kardashian/Instagram

Three generations of beauty! Kim spent some quality time with family during the festivities, posing with her mom and grandmother Mary Jo (a.k.a. "MJ").

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