According to reports by People, the model threw a dazzling Halloween birthday bash at the Blind Dragon in West Hollywood last Thursday, which saw a star-studded line up of her A-list friends, such as the Hadid sisters, Hailey Bieber and Emily Ratajkowski, all turn up in their most glamorous Halloween costumes.
Birthday girl Kendall stole the show dressed as a golden forest fairy, complete with golden antlers, a gold-feathered dress and the most dreamy pair of gauze-like wings.
And of course, just because she can, Kendall took her costume to a whole other level of glam by posing on top of a white horse, looking like she'd walked straight out of the most beautiful fairytale.
Gigi Hadid went all out as Jim Carrey's iconic character from The Mask, complete with a full face of green paint and a bright yellow pantsuit.
Her sister Bella, meanwhile, looked as fierce as ever in a seductive red lip dressed as Catwoman.
Kendall's big sister Kourtney also joined in the celebrations, dressed up as a glitzy Dolly Parton.
Newly-wed Hailey Bieber showed up dressed as Lola Bunny from Space Jam, hopping into the photobooth to take some cute pics with Bella and the birthday girl.
Fellow model Emily Ratajkowski also made an appearance with her husband, Sebastian Bear McClard, who coordinated their costumes dressed as Carmela and Tony Soprano. The couple also made good use of the photobooth, posing with The Weeknd, who went all out dressed as The Joker.