Beyonce and Jay Z were the ultimate Barbie and Ken duo along with their daughter Blue Ivy.
Photo: Instagram/@Beyonce
2/28
It's a me Gisele! The supermodel dressed up as Luigi since her and Tom Brady's son Benjamin wanted to be Mario.
Photo: Instagram/@Gisele
3/28
Justin Timberlake wasn't kidding when he mentioned he would dress his son Silas up as his character from Trolls. Jessica Biel even got in on the fun dressing as Poppy.
Photo: Instagram/@JessicaBiel
4/28
Molly Sims and husband Scott Stuber trick-or-treated with their kids, who looked adorable in Pottery Barn Kids costumes.
Photo: Instagram/@mollybsims
5/28
Alec and Hilaria Baldwin looked 'incredible' with their three children Carmen, Rafael and Leonardo as they took to the streets of NYC.
Photo: Instagram/@HilariaBaldwin
6/28
Alicia Keys' oldest son Egypt showed off his wizardly ways as Harry Potter and Genesis was the cutest little Batman.
Photo: Instagram/@aliciakeys
7/28
Mark and Priscilla Zuckerberg were Vikings as they dressed their daughter Maxima up as a dragon.
Photo: Instagram/@Zuck
8/28
The Beast is down for the count! Katherine Heigl, Josh Kelley and their daughters Naleigh and Adalaide out-Halloweened Josh Kelley.
Photo: Instagram/@KatherineHeigl
9/28
The Lacheys take on Frozen! Nick and Vanessa were Kristoff and Anna as their kids went as Olaf and Queen Elsa.
Photo: Instagram/@VanessaLachey
10/28
Salma Hayek's daughter Valentina was a scary prom queen along with some of her friends.
Photo: Instagram/@SalmaHayek
11/28
Lady Antebellum's Charles Kelley made sure his son Ward was ready for take off on his first Halloween by making his DIY helmet out of tin foil.
Photo: Instagram/@CassieMKelley
12/28
Savannah Guthrie's daughter was a smiley Frida Kahlo with Jenna Bush Hager's daughter Mila, who was a scrumptious donut.
Photo: Instagram/@SavannahGuthrie
13/28
Hooray for Hollywood - and the Harris-Burtka clan! Neil Patrick Harris' brood proved yet again that when it comes to family Halloween costumes they are spook-tacular!
The actor took to his Instagram account to debut their 2016 Hollywood theme, which stars daughter Harper as Marilyn Monroe, son Gideon as James Dean, himself as Groucho Marx and husband David Burtka as Charlie Chaplin.
Photo: Instagram/nph
14/28
King Cairo wants to be just like his future step-father, Rob Kardashian! Blac Chyna shared a video of her son showing off his Halloween costume inspired by Rob, which included a Dodgers baseball hat, "Gucci" flip flops and a black T-shirt.
"This is the cutest thing ever I must say!!" the expectant mom wrote alongside the video. "King doesn't want to be the Ferrari man anymore for Halloween but instead wants to be Rob."
Photo: Instagram/@blacchyna
15/28
Hot dog, banana, and Minnie Mousse! Chrissy Teigen and John Legend's little nugget Luna is definitely ready for her first Halloween.
Photo: Instagram/@ChrissyTeigen
16/28
Chrissy Teigen and John Legend's daughter added three more (adorable) looks to her 2016 Halloween repertoire, modeling a Little Red Riding Hood, Alice in Wonderland and hula girl costume. Following her bikini-clad outfit, Chrissy noted, "Ok that is a wrap on costumes some were sent to us from very kind vendors but we are going to donate them all tonight so other families can get the same joy out of them."
Photo: Instagram/@chrissyteigen
17/28
Jennifer Lopez has two of the cutest trick-or-treaters in her household! The singer treated fans to a celebratory Halloween photo of her twins, which featured Emme dressed as a kitten and Max as Bowser from Super Mario Bros.
Photo: Instagram/@jlo
18/28
Ivanka Trump's children made an adorable trio, with daughter Arabella and son Joseph dressed as characters from Disney Junior's PJ Masks. Meanwhile baby Theo celebrated his first Halloween dressed as Mickey Mouse.
Photo: Instagram/@ivankatrump
19/28
It's morphin time at the Kardashian-Disick home! Kourtney Kardashian showed off her and sons Mason and Reign, along with daughter Penelop Disick's coordinating Power Ranger costumes. Attached to the picture, the mom-of-three wrote, "Happy Halloween!! May the power be with you."
Photo: Instagram/@kourtneykardash
20/28
Casey Wilson's son stole the show in his adorable Donald Trump outfit, complete with 'Hillary 2016' buttons.
Photo: Instagram/@caseyrosewilsosn
21/28
Exes Nick Cannon and Mariah Carey got into the Halloween spirit with their twins, Monroe and Moroccan. The former couple's daughter opted for a Rapunzel costume from Disney's Tangled film, while her mother dressed as a sultry red devil. Meanwhile, Nick and his son coordinated as the Super Mario Brothers. Attached to the family photo, Nick wrote, "Early Halloween Family Flow! #Ncredible."
Photo: Instagram/@nickcannon
22/28
Ivanka Trump's little boy Theodore makes an adorable Mickey Mouse!
Photo: Instagram/@ivankatrump
23/28
Molly Sims got into the Halloween spirit with help from superhero son Brooks by making skull-shaped banana bread snacks.
Photo: Instagram/@mollybsims
24/28
Selma Blair's son Arthur couldn't wait for Halloween – he dressed up as a zombie vampire in anticipation of the big day!
Photo: Instagram/@therealselmablair
25/28
Katherine Heigl showed off her DIY Halloween craftsmanship with these two gorgeous handmade outfits for her little girls.
Photo: Instagram/@katherineheigl
26/28
David Arquette was twinning with his little monster in their Where the Wild Things Are outfits.
Photo: Instagram/@davidarquette
27/28
Nick Lachey has a skeleton in his household! The singer's son made an adorable skeleton at a pre-Halloween bash.
Photo: Instagram/@vanessalachey
28/28
Vanessa and Nick's daughter Brooklyn made the cutest pair of witches at their "Witches & Wizards Pumpkin Party."
Photo: Instagram/@vanessalachey