These Celeb Kids Had the Best Halloween Ever

Tiffani Thiessen shared a fun #FBF of Harper's very first Halloween.

Joel Madden shared this glam snap of Nicole Richie and their little dalmatian duo.

Kim Kardashian and North were joined by friends for some high-fashion Halloween festivities.

A decked-out Rachel Zoe and Skyler Berman (aka Jack Sparrow) paid The Zoe Report offices a visit.

The Sims-Stuber clan dressed up as a kitty, skunk, and king respectively.

"Wizard or last call for Fiddler on the Roof?" wrote the very funny Selma Blair on this sweet snap of little Arthur Saint Bleick.

Rachel Zoe's handsome pair of "Jack Sparrows" underwent multiple costume changes throughout the day.

Molly Sims shared this sweet snap of her "stinky skunk," Brooks.

Pete Wentz shared a selfie with his new baby bear.

Slurp it up! Jimmy Fallon's little girl, Winnie, sported a DIY ramen costume.

Things were looking pretty creepy at the Kardashian-Disick household today.

Molly Sims and Brooks Stuber did a costume change in time for trick-or-treating.

Tiffani Thiessen followed up her family #FBF shot with a photo from this year's unicorn-themed Halloween.

Rachel Zoe's boys traded in their pirate duds for Peter Pan and baby-lamb costumes.

Neil Patrick Harris and his family nailed Halloween — yet again — this time straight from Gotham City!

Beyoncé and Blue Ivy channeled the Jacksons as a superaccurate Janet and Michael.

Ivanka Trump took her little monster, Joseph Kushner, to work with her earlier this week.

Haven Warren (and the entire Alba-Warren family) dressed as bunnies for Halloween.

Alyssa Milano's family — including Milo and Elizabella — made up a gang of superheroes for the holiday.

Egypt Dean was rightfully skeptical of the characters giving out candy on Halloween.

Soleil Moon Frye's daughter, Poet Goldberg, showed off her homeade SunMaid Raisins box costume.

Jayden and Sean Federline were two scary-looking ninjas on Halloween, while their mom, Britney Spears, channeled one of her most famous songs for the occasion.

Gisele Bündchen and Tom, Ben, and Vivian Brady all dressed as dragons, something Gisele described as "what happens when you let your 4-year-old choose the family halloween costumes."

Hilary Duff had a little Captain America, aka Luca Comrie, in her hands.

Debra Messing channeled the cost of A League of Their Own, while her son, Roman Zelman, made the perfect Al Capone.

Madonna's kids, David and Mercy, looked great as Leonardo from Teenage Mutant Ninja Turtles and Pippi Longstocking, respectively.

Cousins Penelope Disick and North West showed off their coorindating skunk costumes.

Axl Duhamel also dressed as a skunk for his first trick-or-treating experience.

Jenna Bush Hager's daughter, Mila, was quite the stud as a baby Elvis.

James Knight Newman, as well as his mom and dad, Jaime King and Kyle Newman, made for a cute pack of monkeys.