We can't get over this cuteness! Fergie and her son, Axl, struck the same pose to show off their Tinkerbell and Peter Pan costumes.
Our hearts melted after seeing Macklemore and his daughter, Sloane, dressed up as Beauty and the Beast.
Fangs for trick or treating! Alba's whole family, including husband Cash Warren and daughters Honor and Haven, transformed into vampires.
Teigen tested out a slew of adorable outfits on her and husband John Legend's daughter, Luna, but the final choice on Halloween night ended up being a pineapple.
Chyna and Rob Kardashian's daughter, Dream, was outfitted in quite a few Halloween costumes this year, but our personal favorite is this precious Raggedy Ann costume.
Neil Patrick Harris and David Burtka
The couple took to Instagram to show off this year's family Halloween costume -- and it is even "freakier" than we imagined. "Hurry, hurry! Step right up and behold the Burtka-Harris Halloween Carnival of Curiosities! #happyhalloween @dbelicious," Harris captioned a pic of him and his family dressed as freak show characters. Harris made a perfect ringleader, while Harper dressed up as a bearded lady, Gideon posed as a strongman and Burtka made a convincingly creepy clown.
Sims' flock -- daughter Scarlett and sons Grey and Brooks -- were ready to hoot in their colorful owl costumes.
Eric Johnson and Jessica Simpson
The Johnson clan went all out for their country-inspired couples costumes! Simpson dressed up as Willie Nelson, while her hubby went as Nelson's long-time collaborator, Waylon Jennings. While the couple's outfits were spot-on, they didn't force their kids to dress up as little country stars as well. Their 5-year-old daughter, Maxwell, went as Belle from Beauty and the Beast while 4-year-old son Ace dressed up as a straight-laced, no-nonsense cowboy.
Carey Hart and Pink
"Happy Halloween from the crazy people #piratelife," Pink wrote of her too cute costumed family.
"This little lamb had his first trip to the pumpkin patch today," the Laguna Beach alum wrote of her too cute son, Liam, dressed up in a farm animal onesie.
Kramer's family transformed into Frozen characters for Halloween. "Happy Halloween!!!!!!!! Hope everyone has an amazing night and gets lots of candy," the "Circles" singer wrote on Instagram.
JWoww's clan dressed up as the cutest Addams Family ever!
"When you realize you’re the hero Gotham needs," Williams and Alexis Ohaninan's baby daughter Alexis' Instagram caption read.
Alec and Hilaria Baldwin
Follow the yellow brick road! The Baldwins and their three kids dressed up as Wizard of Oz characters for Halloween.
Katherine Heigl and Josh Kelley
How precious is this? "The big reveal! Well...it’s Big to me at least! I realize we look like we could be a bunch of bakers, chefs or flight attendants but we are in fact RUSSIAN NESTING DOLLS! Hahahah!" Heigl wrote on Instagram of her family's costumes. "I’m sorry, I just think we all look hilarious! Family themed costumes may be a new tradition...at least as long as I can talk my kids into it! Happy Halloween from the Kelley’s!"
Swing for the trees! The Olympic gold medalist's infant son, Boomer, donned a very cute monkey suit.
Magical! The Victoria's Secret model's daughter was sitting pretty as a voodoo doll.
Scary yet adorable! Rose and her son, Sebastian, had a screamin' good time as Chucky and Tiffany Valentine.
Rebecca Romijn and Jerry O'Connell
The actors' twin daughters, Dolly and Charlie, had a giggle as Beverly Cleary and Waldo, respectively.
Nicole Richie and Joel Madden
Now this is cool! Richie and Madden's son, Sparrow, dressed up as a headless horseman.
Attention! Mowry and her son, Cree, got in formation to show off their soldier costumes.
Hank Bassett and Kendra Wilkinson
Wilkinson and her daughter, Alijah, were twinning in bee costumes, while son Hank went trick or treating in the ghost costume from Scream and her husband rode a camel!
Jamie Lynn Spears
Batter up! Spears' daughter, Maddie, got into character as a zombie softball player.
Milano and her daughter, Elizabella, were twinning as Daisy Ducks.
"A lego and a bunny go to a party," Duff wrote of her mother-and-son costumes.
The Teen Mom 2 star's daughter, Aubree, went all out as a mummy, while her little brother, Watson, was an itty bitty skunk.
Lakshmi's daughter, Krishna, made for one convincing Gamora! "For once I didn’t have trouble getting #littlehands out of bed! We’ve been up since the crack of dawn!" the Top Chef host wrote on Instagram of the elaborate Guardians of the Galaxy costume.
"Yes!!! Halloween prep has officially started with this @lolsurprise It Baby thank you #LOLSurpriseIRL this was so much fun #Ad @lolsurprise @esteestanley," Pompeo wrote on Instagram.
"When the fam takes Halloween VERY seriously ✔️✔️✔️✔️✔️✔️✔️✔️✔️ @powerrangers @walmart #powerrangers #ad," King wrote on Instagram.
Jamie Lynn Sigler
"We've been watching Kid in King Arthur's Court a lot lately... HAPPY HALLOWEEN!!!!!" Sigler said of her and husband Cutter Dykstra's son Beau's costume.