Why so serious?
If there's one star who took their Halloween costume very seriously this year, it's Sean "Diddy" Combs, who turned into the Joker and was almost unrecognizable.
"Hello my friends, I'm the Joker," he wrote on Instagram Oct. 30 while debuting his look. "I'm highjacking Halloween! Hahahaha."
While several A-listers have portrayed Batman's nemesis in film and TV over the years, Diddy seemed to channel Heath Ledger's version of the Joker from The Dark Knight, a role that earned the late actor a posthumous Oscar. From the green hair and the makeup to the purple suit and the laugh, Diddy totally captured the Gotham villain.
So much so, in fact, that many people couldn't believe the transformation when they ran into Diddy, with Tyler, The Creator calling his costume "top tier" and Kim Kardashian noting the music mogul "never broke character" when she saw him at a Halloween party.
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The couple dressed as the Proud Family, along with their kids Blue Ivy, Rumi and Sir.
"A butterfly, a bumble bee, a garden fairy …and then there was Rip… (oh and lyla's tiny ghost boyfriend)," Katherine wrote when sharing family photos.
"I'm not sure how we'll ever get anywhere on time or if my house will ever be clean again, but I sure do love our little family of four," Lauren Lane wrote on Instagram.
"Happy Halloween from the Oreos!" the former View co-host shared with her followers.
"Charlie (and all of our) 2022 most watched movie," the soccer player wrote on Instagram.
"Idk what i am i just thought it was hot," the singer wrote while wearing a I.AM.GIA tank top.
The former TRL host wows at Costume Couture's Halloween bash presented by Lobos 1707 at TAO LA.
It's a spooky night out for the couple who attends Fred & Jason?s 16th Annual Halloweenie Event benefiting Project Angel Food.
"The Sun, the Moon & the beautiful Ster," the NFL quarterback shared on Instagram.
"One small step for man, one giant leap.. chasing the cutest candy filled astronauts around…" the country singer wrote on Instagram. "Hope y'all had a great Halloween!!"
"The only reason we are pirates is because Andy wanted to wear eyeliner," the actress joked on Instagram.
"Insert grim reaper joke here," the NFL quarterback joked on Instagram. "Happy Halloween!"
"Of course I got everyone's costumes together and realized I forgot my own," Hayley Hubbard wrote on Instagram. "So an extra thanks goes out to Amazon for completing our family Halloween fun this year, in record time. Happy Halloween!"
"Happy Halloween from Black Panther, Flash, Iron Mam, and Poison Ivy!" the Teen Mom star wrote on Instagram. "#marvellegends #dccomics #Taylorwasapairofscissors #happyhalloween."
Happy Halloween," Katelyn Brown wrote on Instagram while posing with her family.
The Queen of Halloween celebrates the return of her annual Halloween Party with Baileys Irish Cream Liqueur in New York City.
"Happy Halloween! Let's get ready to rumble!" the Los Angeles Dodgers player and his wife wrote on Instagram. "@canelo @realmichaelbuffer."
"Halloweekend done right," the Bachelor in Paradise stars wrote on Instagram. "Bring on the holidays."
The SpaceX founder attended Heidi Klum's Halloween bash in New York with his mom, Maye Musk.
The couple went as the wet bandits from Home Alone, with him writing, "All the great ones leave their marks."
The TikToker dressed as Dorothy from the Wizard of Oz.
"Time to go get some candy," Hailey wrote while showing off her cozy costume.
Powered by Deleón Tequila, Diddy hosted an exclusive Halloween Club Love party at a private location where he arrived in the back of a police car in full Joker character.
The Frozen star channeled another Disney character as Ursula, writing, "I admit that in the past I've been a nasty."
The couple posed with their daughter Stormi and 8-month-old son.
Her and John Mulaney's son Malcolm dressed up as her mom, Kim Munn, complete with a black wig.
Her son Ever went as a surgeon (more specifically, Grey's Anatomy's McDreamy).
The Goop founder rocked a Winnie the Pooh look.
The singer showed off her fake blood on her Instagram Story.
Kendall made fun of her own #cukegate episode of The Kardashians by dressing as a cucumber.