Kim Kardashian may have been just a tad bit overdressed for this occasion.
As the SKIMS founder revealed in an Oct. 30 Instagram Story, she attended Tracee Ellis Ross' birthday dinner over the weekend wearing a striking Mystique costume for the event. But, as Kim noted, her choice of clothing may not have totally matched the theme.
"That time I showed to a birthday dinner in full costume when it wasn't a costume party!" Kim wrote alongside a photo of herself and the Hair Tales creator. "Happy Birthday to the most beautiful kind soul @traceeellisross."
However, it's worth noting that she wasn't the only family member getting all dressed up and into the spirit for the spooky festivities this year. In fact, just days before, Kim's kids, North, 9, Saint, 6, Chicago, 4 and Psalm, 3, each channeled pop culture icons for their individual costumes. In an Oct. 28 Instagram post, Kim revealed that the four paid tribute to Aaliyah, Snoop Dogg, Sade Adu and Eazy-E respectively.
But Kim isn't the only star adding a little mystique to Halloween this year.
Keep scrolling for more photos of celebs and their head-turning costumes:
Beyoncé and Jay-Z
The couple dressed as the Proud Family, along with their kids Blue Ivy, Rumi and Sir.
Katherine Schwarzenegger & Chris Pratt
"A butterfly, a bumble bee, a garden fairy …and then there was Rip… (oh and lyla's tiny ghost boyfriend)," Katherine wrote when sharing family photos.
Chris Lane
"I'm not sure how we'll ever get anywhere on time or if my house will ever be clean again, but I sure do love our little family of four," Lauren Lane wrote on Instagram.
Lisa Ling
"Happy Halloween from the Oreos!" the former View co-host shared with her followers.
Alex Morgan & Servando Carrasco
"Charlie (and all of our) 2022 most watched movie," the soccer player wrote on Instagram.
Doja Cat
"Idk what i am i just thought it was hot," the singer wrote while wearing a I.AM.GIA tank top.
La La Anthony
The former TRL host wows at Costume Couture's Halloween bash presented by Lobos 1707 at TAO LA.
Lance Bass & Michael Turchin
It's a spooky night out for the couple who attends Fred & Jason?s 16th Annual Halloweenie Event benefiting Project Angel Food.
Patrick Mahomes
"The Sun, the Moon & the beautiful Ster," the NFL quarterback shared on Instagram.
Brett Young
"One small step for man, one giant leap.. chasing the cutest candy filled astronauts around…" the country singer wrote on Instagram. "Hope y'all had a great Halloween!!"
Claire Holt
"The only reason we are pirates is because Andy wanted to wear eyeliner," the actress joked on Instagram.
Tom Brady
"Insert grim reaper joke here," the NFL quarterback joked on Instagram. "Happy Halloween!"
Tyler Hubbard
"Of course I got everyone's costumes together and realized I forgot my own," Hayley Hubbard wrote on Instagram. "So an extra thanks goes out to Amazon for completing our family Halloween fun this year, in record time. Happy Halloween!"
Maci Bookout
"Happy Halloween from Black Panther, Flash, Iron Mam, and Poison Ivy!" the Teen Mom star wrote on Instagram. "#marvellegends #dccomics #Taylorwasapairofscissors #happyhalloween."
Kane Brown
Happy Halloween," Katelyn Brown wrote on Instagram while posing with her family.
Heidi Klum
The Queen of Halloween celebrates the return of her annual Halloween Party with Baileys Irish Cream Liqueur in New York City.
Justin & Kourtney Turner
"Happy Halloween! Let's get ready to rumble!" the Los Angeles Dodgers player and his wife wrote on Instagram. "@canelo @realmichaelbuffer."
Hannah Godwin & Dylan Barbour
"Halloweekend done right," the Bachelor in Paradise stars wrote on Instagram. "Bring on the holidays."
Elon Musk
The SpaceX founder attended Heidi Klum's Halloween bash in New York with his mom, Maye Musk.
Justin Timberlake & Jessica Biel
The couple went as the wet bandits from Home Alone, with him writing, "All the great ones leave their marks."
Dylan Mulvaney
The TikToker dressed as Dorothy from the Wizard of Oz.
Hailey Bieber
"Time to go get some candy," Hailey wrote while showing off her cozy costume.
Diddy
Powered by Deleón Tequila, Diddy hosted an exclusive Halloween Club Love party at a private location where he arrived in the back of a police car in full Joker character.
Josh Gad
The Frozen star channeled another Disney character as Ursula, writing, "I admit that in the past I've been a nasty."
Kylie Jenner & Travis Scott
The couple posed with their daughter Stormi and 8-month-old son.
Olivia Munn
Her and John Mulaney's son Malcolm dressed up as her mom, Kim Munn, complete with a black wig.
Lea Michele
Her son Ever went as a surgeon (more specifically, Grey's Anatomy's McDreamy).
Gwyneth Paltrow
The Goop founder rocked a Winnie the Pooh look.
Billie Eilish
The singer showed off her fake blood on her Instagram Story.
Kendall Jenner
Kendall made fun of her own #cukegate episode of The Kardashians by dressing as a cucumber.