Darren Criss & Mia Swier
Dalmation and Cruella Deville arrive to the Podwall Entertainment 10 Year Anniversary Halloween Party presented by Maker's Mark at the Peppermint Club.
Erin Foster
"Got left out of another family costume," the actress joked as Sara Foster and her family wore Tipsy Elves unicorn onesies.
Brie Larson
Hit me baby one more time! We love this Britney Spears costume!
Carrie Underwood
"Hope everyone had a good #Halloween!" the American Idol winner shared from Detroit. "Lots of love from Cheer Bear, The Grinch, Max and Buck Daniels..."
Lance Bass & JC Chasez
It's an NSYNC reunion at Podwall Entertainment's 10th Annual Halloween Party presented by Maker's Mark.
Bette Midler
The Hocus Pocus actress her annual Hulaween bash to benefit New York Restoration Project (NYRP) on Thursday in New York City.
Hannah Godwin & Dylan Barbour
With help from celebrity stylist Lisa Marie Cameron, the Bachelor in Paradise duo nail Grease's beloved couple.
Blake Horstmann
"Figured I would be the judge for once #bigjudgejudyguy #judgejudyissexy #yesimwearinglipstick #iwouldactuallymakeacutegirlithink," the Bachelor in Paradise star joked on Instagram.
Kelsea Ballerini
"Happy Halloween from Napa, where I have never felt more myself," the country singer shared on Instagram.
Alessandra Ambrosio
Spooky and sexy! The supermodel spends Halloween night at her and Darren Dzienciol's Horror In The Hills party sponsored by PATHWATER.
Gigi Hadid
While attending Kendall Jenner's Halloween party, the supermodel stepped out as Jim Carrey's character in The Mask. She completed her look with 8 Other Reasons "Jane Hoops" earrings.
LeBron James
"Happy Halloween folks from LeDward Scissorhands & Sadusa," the Los Angeles Lakers basketball stud shared on Instagram.
Ayesha Curry & Stephen Curry
The family isn't playing around this year. The Golden State Warrior basketball player and his crew dresses up as characters from Toy Story 4.
Tarek El Moussa
"Our first family photo and this picture makes me so happy!" the Flip or Flop star shared on Instagram. "[Halloween] night was the first night we all got together! When I saw all, I mean me, Heather, the kids, Christina and Ant. We had such a great time because the kids had a great time!"
Maci Bookout & Taylor McKinney
The Teen Mom OG family deserves a round of applause for their creative–and spooky—looks.
Tia Mowry
"#happyhalloween from #teentitans #robin #raven #cyborg and #starfire! I can't believe this is our 8th #halloween together as a family," the Sister, Sister star shared on Instagram. "Cree always chooses who he wants to be and then the entire family builds our #halloweencostume ideas around that! #iloveplumchange."
Ariana Grande
The singer draws inspiration from The Twilight Zone.
Rachel Zoe
"#Halloween vibes at 8am in costume look 1 #werewolf and sleepy mom," the fashion designer shared on Instagram when showcasing her son's Pottery Barn Kids costume.
Chrissy Teigen
The Lip Sync Battle star can't help but showcase Luna's Halloween costume from Pottery Barn Kids on Twitter.
Nick Viall
Dressed from head to toe! The Bachelor star completes his squirrel costume with a pair of KOIO's Primo sneakers.
Meghan King Edmonds
The former Real Housewives of Orange County star goes a "crypt-ic post" amid drama with husband Jim Edmonds.
Mariah Carey
All she wants for Christmas is...for Halloween to never end at Heidi Klum's 20th Annual Halloween Party presented by Amazon Prime Video and SVEDKA Vodka.
Antoni Porowski & Kevin Harrington
The celeb chef and his new love are here to remind you to please rewind your VHS tapes.
Barbara Palvin & Dylan Sprouse
The couple that slays costumes togethers, stays together.