Stars Celebrating Halloween 2021: Billie Eilish, Kyle Richards & More

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October 25, 2023 5:59AM EDT

Boo! Halloween is here, and some of your favorite celebrities are getting into the spirit of the season. Check out all the stars in their spooky, scary, and sometimes sexy costumes.

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Celebrities Celebrating Halloween 2021

Celebrities Celebrating Halloween 2021 — Forget all those other holidays. Halloween truly is the most wonderful time of the year. It’s the season of monsters, maniacs, zombies, witches, and every other horror movie creep haunting your nightmares. It’s also the time of year to dress up, and everyone – even some of the biggest stars in television, movies, music, and more – get in on the fun. It’s a chance for every star to embrace their inner demon…and take it trick or treating!

Take, for instance, this group here: Teddi Mellencamp Arroyave, Dorit Kemsley, Kathy Hilton, Kyle Richards and Lisa Rinna attended the costume party premiere of Universal Pictures’ ‘Halloween Kills’ on Oct. 12. The event, at the TCL Chinese Theatre in Hollywood, had a STRICT dress code, and these stars all adhered to it (though, one would have to argue if Dorit was going for an early 2000s Paris Hilton, or if she was a princess.) There was no doubting Lisa’s costume – a killer bunny – or Kyle Richards’s sexy circus outfit. They clearly understood the assignment – as did all the other celebs and stars in this gallery. Check em out – if you DARE!

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Kim Kardashian As A Space Cowboy

Kim Kardashian As A Space Cowboy — Kim Kardashian leaves a Halloween party while dressed as a Space Cowboy. She wore a silver ensemble ,featuring a crop top, skirt and cowboy hat.

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Rihanna As Beetlejuice

Rihanna As Beetlejuice — Rihanna channels Beetlejuice as she leaves a Halloween party in the early hours of the mornign. She wore a black and white outfit with sunglasses and dark lipstick.

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Chris Brown As A Mummy

Chris Brown As A Mummy — Chris Brown dresses as a mummy while leaving a Halloween party in Los Angeles. He attended LeBron James’ bash for the holiday.

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Kendall Jenner As Martian Girl

Kendall Jenner As Martian Girl — Kendall Jenner dresses as Martian Girl from Mars Attack! on Halloween 2021. She attended a private birthday party for her boyfriend, Devin Booker, on the holiday.

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Justin Bieber As ‘Free Guy’

Justin Bieber As ‘Free Guy’ — Justin Bieber channels Ryan Reynolds’ character in ‘Free Guy’ for Halloween. He attended Devin Booker’s birthday party to celebrate.

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French Montana as The Weeknd

French Montana as The Weeknd — French Montana dressed as The Weeknd for his 2021 Halloween costume. He attended a party in West Hollywood in the look.

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Megan Thee Stallion As A Butterfly

Megan Thee Stallion As A Butterfly — Megan Thee Stallion threw a Halloween party in Los Angeles on Oct. 31. She dressed as a sexy butterfly, wearing a bejewled bodysuit and massive wings.

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Stassie Karanikolaou As The Joker

Stassie Karanikolaou As The Joker — Stassie’ Karanikolaou dresses as a Tattooed Joker while attending Kendall Jenner’s private Halloween party in 2021. She wore a green crop top and purple mini skirt for the costume.

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Billie Eilish Dresses As Sally For Halloween

Billie Eilish Dresses As Sally For Halloween — Billie Eilish channels Sally from ‘Nightmare Before Christmas’ while performing in Los Angeles on Halloween. She wore face paint and Sally’s patchwork dress.

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Doja Cat As Cynthia From ‘Rugrats’

Doja Cat As Cynthia From ‘Rugrats’ — Doja Cat attended a Halloween party on Oct. 31 in Los Angeles. She dressed as Angelica’s doll, Cynthia, from Rugrats for the occasion.

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Teyana Taylor In Crop Top & Skirt

Teyana Taylor In Crop Top & Skirt — Teyana Taylor wears a crop top and teeny-tiny skirt for her Halloween costume. She paired the ensemble with a blue wig.

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Kaia Gerber In Blonde Wig

Kaia Gerber In Blonde Wig — Kaia Gerber wears a blonde wig while leaving a Halloween party with boyfriend Jacob Elordi. She also wore a little black dress for her costume.

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Victoria Justice

Victoria Justice — Victoria Justice attends the DECADA Presents Darren Dzienciol’s CARN*EVIL Halloween Party on Oct. 30, 2021. She wore dramatic facepaint and a corset top with black mini skirt. Her look was complete with thigh-high boots and fishnets, too.

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Ryan Phillippe

Ryan Phillippe — Ryan Phillippe walks the red carpet at the DECADA Presents Darren Dzienciol’s CARN*EVIL Halloween Party. He dressed as a pirate for the party.

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Sailor Brinkley-Cook

Sailor Brinkley-Cook — Sailor Brinkley-Cook looks super sexy in a lacy black outfit for the DECADA Presents Darren Dzienciol’s CARN*EVIL Halloween Party. Her look was complete with a face mask, sheer gloves and black booties.

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Jamie Foxx

Jamie Foxx — Jamie Foxx hides under his costume for the DECADA Presents Darren Dzienciol’s CARN*EVIL Halloween Party. He dressed in a massive inflatable suit for the occasion.

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Alessandra Ambrosio

Alessandra Ambrosio — Alessandra Ambrosio rocks a plunging bejewled body suit in her costume for the DECADA Presents Darren Dzienciol’s CARN*EVIL Halloween Party. She also rocked a pastel wig and headpiece.

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Josie Marie Canseco

Josie Marie Canseco — Josie Marie Canseco attends the DECADA Presents Darren Dzienciol’s CARN*EVIL Halloween Party in Los Angeles. She rocked a plunging green jumpsuit while channeling the Riddler.

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Dylan Penn

Dylan Penn — Dylan Penn shares a passionate kiss with a girl after leaving a Halloween party in West Hollywood. The ladies wrapped their arms around each other as they indulged in PDA.

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Larsa Pippen

Larsa Pippen — Larsa Pippen shows off her hourglass figure in black lingerie as she heads to a Halloween party in Bel Air. She was dressed as a Victoria’s Secret angel for the party.

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Paris Jackson

Paris Jackson — Paris Jackson was seen leaving an A-List Halloween Party in West Hollywood, CVA. She looked great while dressed as a witch for the holiday.

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Doja Cat

Doja Cat — Doja Cat at Carn*Evil Halloween Party in Los Angeles Presented by Darren Dzienciol. Look at that red dress!

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Stassie and Justine Skye

Stassie and Justine Skye — Stassie and Justine Skye are all dolled up as they leave a Halloween party in Los Angeles. Look at their awesome costumes!

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Joe Jonas and Sophie Turner

Joe Jonas and Sophie Turner — Joe Jonas and Sophie Turner attend a friend’s Halloween party wearing matching headsets. They wore ‘Lizzie McGuire’ costumes.

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Justin Bieber and Hailey Bieber

Justin Bieber and Hailey Bieber — Justin Bieber and Hailey Bieber were in costume while leaving an A-List Halloween Party in West Hollywood in 2021. They channeled ‘The Jungle Book’ for their Halloween looks.

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Olivia Jade

Olivia Jade — Olivia Jade is dressed as a black swan as she and a man attend a Halloween party in Los Angeles. She looked fantastic!

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Ellen DeGeneres & tWitch

Ellen DeGeneres & tWitch — Ellen DeGeneres and tWitch dress up as future versions of themselves for the Oct. 29 episode of ‘The Ellen DeGeneres Show.’ It was in celebration of their final Halloween episode before the show’s ending.

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Ellen DeGeneres

Ellen DeGeneres — Ellen DeGeneres rolls into her show on an electric wheelchair for her 2021 Halloween episode. She dressed as an older ‘future’ version of herself.

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Larsa Pippen

Larsa Pippen — Larsa Pippen looks to die for as fictional character Elvira Hancock from the 1983 American crime drama film ‘Scarface’ as she arrives for Drake’s Halloween party. It was in Hollywood on October 23, 2021.

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Farrah Abraham

Farrah Abraham — Farrah Abraham visits the Haunt O’ Ween Immersive Halloween Experience at the Westfield Topanga in Los Angeles. She dressed as a member of the Bunny Squad on September 30, 2021.

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AnnaLynne McCord & Sister Rachel McCord

AnnaLynne McCord & Sister Rachel McCord — Sisters AnnaLynne and Rachel McCord coordinate in ‘101 Dalmatians’-inspired costumes at a pumpkin patch in Las Vegas on October 24, 2021. Rachel opted for a sexy Cruella De Vil while sister AnnaLynne went as one of her henchmen.

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Billie Eilish

Billie Eilish — Hey look — ROCK LOBSTER! Billie Eilish looked like a really cute crustacean at Doja Cat’s birthday party. On October 20th, the Grammy-winning superstar showed up dressed as a lobster for the bash in West Hollywood. Is it too late for a recast in the live action ‘Little Mermaid’?

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Doja Cat

Doja Cat — Oh, that’s a deep Disney cut, girl! Doja Cat celebrated her birthday with a big Halloween bash on October 20, 2021 in West Hollywood and she came dressed to impress. Now, if you think she’s sporting a ‘sexier’ Prince Jasmine costume, SIT DOWN, because Doja is actually dressed like Princess ‘Kida’ Kidagakash from the fan-fave, but often forgotten about animated flick, ‘Atlantis’. Nicely done, bb!

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Karrueche Tran

Karrueche Tran — The Greek goddesses of yore never looked this good! Karrueche Tran arrived at Doja Cat’s birthday party at Delilah’s on October 20th looking gorgeous in a green, sheer toga. High slit, halter top, so much fun for a Wednesday night!

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Tyga

Tyga — Yes, that’s Tyga — not Scuba Steve! The rapper was barely recognized as he arrived at Doja Cat’s underwater themed birthday party at Delilah’s. Hope he dived into some real fun.

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Mauricio Umansky & Kyle Richards

Mauricio Umansky & Kyle Richards — Real estate agent Mauricio Umansky and wife/actress Kyle Richards arrive at the Costume Party Premiere Of Universal Pictures’ ‘Halloween Kills’. Mauricio appears like he was getting done with his shift at Disneyland’s Haunted Mansion, right?

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Lisa Rinna

Lisa Rinna — What happens when you cross Easter and Halloween? You get Lisa Rinna’s costume at the ‘Halloween Kills’ film premiere.

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Kathy Hilton

Kathy Hilton — Kathy Hilton dressed up as the most chill-inducing, fearful thing imaginable: a dentist. This costume was scarier than Michael Myers (which is fitting, since she wore it at the ‘Halloween Kills’ film premiere.)

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Dorit Kemsley

Dorit Kemsley — Dorit Kemsley seemingly channeled Paris Hilton for her costume at the ‘Halloween Kills’ film premiere. Or she felt like this was a time to show off how she’s really a princess. Help us out, Dorit.

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Jamie Lee Curtis

Jamie Lee Curtis — THIS is how you do it. Jamie Lee Curtis honored both her mother (Janet Leigh) and horror movies with her outfit at the ‘Halloween Kills’ premiere. Jamie Lee dressed up as Marion Crane, who her mother portrayed in ‘Psycho’, at the event. She even brought a blood-stained shower curtain. PERFECTION.

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Benito Skinner

Benito Skinner — Benito Skinner has a thirst — for BLOOD! He wore an all-red outfit at the ‘Halloween Kills’ premiere. Again, does this qualify as a costume?

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Farrah Abraham & Daughter Sophia

Farrah Abraham & Daughter Sophia — Farrah Abraham channeled Lola Bunny while visiting the Haunt O’ Ween LA An Immersive Halloween Experience at the Westfield Topanga with her daughter Sophia. Come on and slam, and welcome to the jam.

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Tori Spelling & Kids

Tori Spelling & Kids — Tori Spelling and her kids attend the Nights of the Jack Halloween event in California. The actress rocked devil ears to dress up for the occasion

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