Tom Kaulitz & Heidi Klum
The party's hosts didn't need to phone home for reinforcements. After all, they made jaws drop with their ET looks.
Chase Stokes & Kelsea Ballerini
The couple is hopelessly devoted to the holiday, dressed as Danny and Sandy from Grease.
Leni Klum
Heidi's daughter followed suit with an other-worldly transformation, covered in white body paint.
Ice-T & Coco Austin
Coco put down the hammer on their frightening couples costumes.
Charli D'Amelio
The TikToker leaned into her dance roots with a Black Swan 'fit.
Nicole Scherzinger
The Pussycat Dolls alum was ready for her close-up dressed as her character from Sunset Blvd.
Bethenny Frankel
The Shark Tank star may have been the hero of the night with her dazzling Wonder Woman costume.
Mario Cantone
The Sex and the City star was quite devilish.
Questlove
The Roots frontman spilled all the tea before stepping into the night's festivities.
Shyenne Lee & Sunisa Lee
The Olympic gymnast and her sister were on pointe with their twinning attire.
Joey Graceffa
The YouTuber was a total fantasy as Mr. Tumnus from the Chronicles of Narnia.
Valentina Ferrer
The model turned back time with a Cher costume.
Aria Addams
The TV personality struck a bewitching pose before heading into the Halloween celebration.
Emma Norton
The TikToker debuted a stunning transformation as Lord Farquaad from Shrek.
David Kirsch & Tamsen Fadel
The pair looked eerie-sistible while posing for a snap inside the event.