John Cena had the most talked-about outfit at the 2024 Oscars.

The Barbie actor walked out on stage with not a stitch of clothing as part of a bit with Jimmy Kimmel at the March 10 show at Los Angeles' Dolby Theatre. 

But Cena—who appeared naked with just Birkenstocks on his feet and an envelope covering his crotch—achieved the look by actually wearing a covering over his privates, as he was seen backstage with nude underwear.

As part of the sketch, the WWE star was supposed to run across the stage as a streaker.

"I changed my mind I don't wanna do the streak bit," he told Jimmy. "I just don't feel right about it, man. It's an elegant event. Honestly you should feel shame right now for suggesting such a tasteless idea."

While the nominees were displayed onscreen, Cena changed into a peachy toga-inspired look off camera and went on to present the award for Costume Design to Poor Things. (See all of the 2024 Oscar winners here.)

Going into the show, Oppenheimer led the pack with 13 nominations, while the Poor Things trailed closely with 11 nods, with Cillian Murphy and Emma Stone each earning nominations in the leading Actor and Actress categories, respectively. 

After the nominees were announced, Stone—who won the Oscar in 2017 for La La Land—noted that being recognized again this year felt like a "surreal dream."

"The team of artists who contributed to Poor Things gave it everything," she said in a statement in January, "and I am forever thankful for the opportunity to play Bella and see the world through her eyes. She has shown me that life is so much more than just sugar and violence."

Keep reading to see more stars stepping out at the 2024 Oscars:

In Armani Privé and Bulgari jewelry.

Del Core SS24 RTW and Bulgari jewelry.

In custom Louis Vuitton.

In custom Christian Dior Haute Couture with Swarovski jewelry.

In custom Balenciaga Couture.

In Gucci x Joe Big Mountain.

In Loewe.

In Bucherer Fine Jewellery.

In Gucci.

In Saint Laurent and Tiffany & Co.

In Versace FW24 RTW.

In custom Giambattista Valli Haute Couture with Tiffany & Co. jewelry.

In Dolce & Gabbana.

Christian Dior Haute Couture.

Ryan Gosling in custom Gucci.

Kelly Ripa in archive Donna Karan New York.

In custom Vera Wang.

In custom Louis Vuitton.

In custom Armani Privé.

In custom Atelier Versace.

In Elie Saab SS24 Couture and Chopard jewelry.

Kirsten Dunst in Gucci with Fred Leighton jewelry.

In Loewe.

In Chanel.

In Giorgio Armani.

Gabrielle Union in Carolina Herrera PF24 with Tiffany & Co. jewelry and Dwyane Wade in custom Ateliee Versace.

In custom Brunello Cucinelli.

For the latest breaking news updates, click here to download the E! News App