Simone Biles’ fiancé has her back — and her butt.

The gymnast, 25, (sort of) brought Jonathan Owens along on her bachelorette party in Belize, showing off her jeans customized with “Mrs. Owens” across the butt on Instagram Thursday.

In a video, she showed off the details even closer, revealing that her Bal Apparel bottoms were also embellished with pearls down the side.

While Owens, who plays football for the Houston Texans, sweetly commented, “Counting down the days,” some of Biles’ fans were not happy about the moniker on her pants.

“You’re one of the best gymnast of the world. Use your own name, Biles is an strong and powerful name,” one person commented.

Another said, “He should have to take your last name lol.”

Owens proposed on Valentine’s Day last year, presenting Biles with a 3-carat oval-cut diamond engagement ring. The pair have yet to reveal their wedding date, but Biles shared last March that she’ll be wearing two different dresses by Galia Lahav on the big day.

The Olympian documented her bachelorette trip on Snapchat, showing off a series of all-white looks ranging from cheetah-printed pajamas to a bridal version of the “Bach and Boujee” T-shirts worn by her bridesmaids.

While fellow celebrities like Kim and Kourtney Kardashian sported leather motorcycle jackets with their new last names on the back after their weddings to Kanye West and Travis Barker, respectively, Biles put a spin on the Juicy tracksuit with her personalized pants.

We predict a new trend could be coming — whether or not Biles trades in her last name for Owens when they tie the knot.