• Celebrities often make for great inspiration when coming up with an epic Halloween costume. 
  • Even famous people have adapted their peers’ signature styles to celebrate the spooky holiday. 
  • Nina Dobrev, Harry Styles, and Kylie Jenner, have all copied musicians like Billie Eilish, Elton John, and Christina Aguilera, respectively. 
  • Insider rounded up 18 photos of celebrities dressed as other celebrities for Halloween. 

SEE ALSO: The best celebrity Halloween costumes of 2019, so far

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Jessica Biel went as her husband Justin Timberlake for Halloween 2019.

The actress copied her husband’s ’90s aesthetic while he went as a giant microphone.

Evan Peters and Halsey made their red carpet debut as a couple while dressed as Sonny and Cher.

They wore matching polka dot looks, and the “American Horror Story” star added a mustache to complete his Sonny costume. 

Kim Kardashian West and pal Jonathan Cheban also took inspiration from Cher and Sonny, respectively.

She emulated the singer by wearing a yellow crop top and matching pants to the Casamigos Halloween Party in 2017.

Ciara and Russell Wilson emulated Beyoncé and Jay-Z’s looks from the “Apes—” music video.

They also swapped out the Mona Lisa with a photo of Michelle and Barack Obama. 

Nina Dobrev nailed her Billie Eilish costume.

The “Vampire Diaries” star wore an orange Louis Vuitton sweatshirt with matching pants. She also colored her dark roots bright green and painted black tears down her face to emulate Eilish’s look from the “When the Party’s Over” music video. 

Eminem’s daughter Hailie Jade Mathers had a spot-on Ariana Grande costume for Halloween 2019.

The Instagram influencer’s look consisted of an oversized flannel, thigh-high boots, a choker, and a lollipop. 

Kourtney Kardashian also used Grande as inspiration for her costume in 2018.

The “Keeping Up With the Kardashians” star wore her hair up in Grande’s signature high ponytail.

She also wore a pink babydoll dress, much like the one the pop star wore during an appearance on “The Tonight Show Starring Jimmy Fallon” in May 2018. 

Stormi Webster went as her mom, Kylie Jenner.

Jenner dressed the daughter she shares with Travis Scott in a mini version of the purple look she wore to the 2019 Met Gala — lilac wig and all. 

Before Stormi went as Kylie, Kardashian West copied her own Met Gala look for her Halloween costume.

In 2015, Kardashian West rewore her 2013 Met Gala dress. 

Lisa Rinna took on Jennifer Lopez’s iconic Versace gown.

JLo approved of the “Real Housewives of Beverly Hills” star’s take.

“It was really, really cute. She looked awesome,” the “Hustlers” star told “Access Hollywood” of Rinna’s outfit.

Kevin Hart copied Dwayne “The Rock” Johnson for his Halloween costume this year.

He wore a black turtleneck, a gold chain, jeans, and a fanny pack. 

Harry Styles won Halloween 2018 with his sparkly take on Elton John.

The former One Direction member wore a glittery Dodgers uniform and oversized, bedazzled sunglasses for his rendition of Rocketman. 

Kylie Jenner looked just like Christina Aguilera in 2016.

The cosmetics mogul copied the singer’s iconic look from the 2002 music video for “Dirrty.”

Karlie Kloss looked striking as Marilyn Monroe in 2017.

The model wore a shawl and white dress similar to Monroe’s iconic look. 

Nina Dobrev went as US Olympic swimmer Ryan Lochte in 2016.

The “Vampire Diaries” star appeared to be making fun of Lochte’s scandal in Rio de Janeiro that was going on at the time. 

Paris Hilton took on Miley Cyrus in 2013.

Hilton wore a mouse leotard and accessorized with a foam finger for her Cyrus-inspired costume. 

Meanwhile, Paris was the inspiration behind sister Nicky Hilton’s 2018 costume.

She copied her sibling’s iconic dress that she wore to her 21st birthday party in 2002. 

Rita Ora’s Post Malone costume in 2018 was uncanny.

She pulled off the look by adding facial hair and Malone’s face tattoos.