Jessie James Decker & Eric Decker
"Happy Halloween from the Deckers!!" Jessie James shared with her followers on Instagram while wearing boots from her JustFab collection. "We did our best to get a family shot! Lol."
Jessica Alba & Cash Warren
"Our first Halloween as a #familyoffive was a good time!" the Honest Company businesswoman wrote on Instagram. "#kidspickedthem #giraffe #unicorn and thx @potterybarnkids for Havie and Haysie's costumes #lovemypbk."
Chrissy Teigen & John Legend
"We were gonna go somewhere," Queen Elizabeth II's doppelgänger said, "but we're so tired!" Chrissy was able to perfect her costume thanks to Sergio Hudson.
Janet Holden & Eric McCormack
"It was a graveyard smash," the Will & Grace actor joked.
Ryan Hansen
The actor's family travels back in time to the '50s.
Jennifer Garner
The Camping actress' makeup is quite bewitching!
Kim Zolciak-Biermann
"The kids are at great ages for a loooong night of door after door," the Bravo reality star wrote.
Kim Kardashian
The E! reality star modeled one of Pamela Anderson's iconic red carpet looks.
Kristen Bell
The Frozen actress said this is "the SECOND year in a row my daughter demanded I be Elsa to match her."
Bruno Mars
What would the late Jimi Hendrix think of his "mini Hendrix" costume?
Beyoncé
For her second look this year, the singer channels Olympian Florence Griffith Joyner in a custom made costume by Death By Dolls.
Jeremiah Brent & Nate Berkus
"Happy Halloween from Cinderella, Prince Charming, a Cooker and the Lobster!" Berkus wrote.
Bethenny Frankel
The Real Housewives of New York City star said her Victoria's Secret Angel costume was "heaven sent" before attending SECOND at Kimpton Hotel Eventi's Halloween bash.
Jeffrey Dean Morgan & Hilarie Burton
We've got Harley Quinn, The Joker, a narwhal, a witch and a cowboy!
Janelle Monáe
Dressed as Willy Wonka, the singer joked, "HELLO. Want SoMe ChOcoLate?"
Christopher French & Ashley Tisdale
Two sharks? We're gonna need a bigger boat.
Brad Falchuk & Gwyneth Paltrow
There's nothing "Shallow" about the "happy" newlyweds' A Star Is Born costumes.
Gus Kenworthy
"There's no place like homo," the athlete, dressed as Dorothy from The Wizard of Oz, joked.
Alicia Keys
The singer played Stealth in the fictional film Ninja Keys VIII. "I would watch this movie," she joked. "How about y'all?"
Ed Sheeran
Would Prince Harry approve of the singer's "Scary Harry" costume?
Diplo
Teasing his collaborator Dua Lipa, the producer joked, "Her name is electricity."
Brad Goreski
As Elton John, the stylist joked, "I'm a rocket man."
Alec Baldwin & Hilaria Baldwin
Shoot for the stars! The entire family became astronauts.
Adriana Lima
Strike a pose! The Victoria's Secret model and her family were everything glitter and glam for their festivities.