The royal couple jetted into Sin City for the concert, held inside The Theatre at Resorts World Saturday night, where they cheered on Perry near her fiancé, Orlando Bloom.

Social media snaps show Harry, 39, and Markle, 42, arriving in all black ensembles, much to the surprise of their visibly shocked fellow concertgoers.

Bloom – who lives near the Duke and Duchess of Sus𝑠e𝑥 in Montecito, Calif. – was also in the crowd with his 3-year-old daughter, Daisy, whom he shares with Perry.

Back in 2021, Harry revealed he and the “Suits” alum were friendly with the “Teenage Dream” singer, 39, and her actor beau, 46.

The singer performed her final residency show in Vegas Saturday night.Brian Prahl / SplashNews.com

“Just two days ago, Orlando Bloom sent me a message — because he’s just down the road and we sort of keep in contact,” he said on the Armchair Expert podcast, explaining that they keep in touch about security in the area.

Perry, for her part, supported Harry’s father, King Charles lll, by performing at the Coronation Concert in London in May.

Celine Dion was also spotted in the VIP section of the “Roar” singer’s concert with her twin sons, Eddy and Nelson, 13.

She has been friendly with the royal couple since they relocated to California in 2020.MEGAHarry previously revealed he stays in touch with Perry’s partner, Orlando Bloom, about security.i-Images / Polaris

The outing came one year after the legendary “My Heart Will Go On” singer, 55, revealed she has been battling stiff-person syndrome.

As for Perry, she kicked off the Vegas residency, titled Play, in December 2021 and continued extending the calendar through November 2023.

Ahead of her final show, the “I Kissed A Girl” songstress posted photos and videos from her wrap party with members of her cast and crew.

Perry kicked off her successful run of Vegas shows two years ago.Brian Prahl / SplashNews.com

“Last night’s wrap partay with the BEST cast & crew in Sin City bcuz there are ONLY  SHOWS LEFT TIL WE SHAKE THE GLITTER OFF, LAS VEGAS ,” she captioned the post.

She and Bloom welcomed their baby girl in August 2020, making the “Pirates of the Caribbean” actor a father of two. He continues to co-parent son Flynn with ex-wife Miranda Kerr, and the exes maintain a great relationship.

The “American Idol” judge even gave a heartwarming speech about the Victoria’s Secret model at an event in January.

Singer Celine Dion was also spotted in the crowd.

Perry said she was “proud to be family with a woman who is living her truth every day with grace and beauty.”

She joked that Kerr, who is also a mom to Hart, 4, and Myles, 3, is “dedicated to her three beautiful boys, her partner and that smoking hot bod.”

“I’m so grateful for our modern blended family. It’s like I gained another sister, one with whom I usually sidebar from the main family chat and agree with,” the “Firework” singer concluded.