Prince Harry, Meghan Markle make surprise appearance at Katy Perry show

They made the crowd roar, roar, roar.

Prince Harry and his wife, Meghan Markle, shocked onlookers Saturday night when they showed up to the finale of Katy Perry’s “PLAY” residency at the Resorts World Theatre in Las Vegas.

A photo posted to X shows the Duke and Duchess of Sussex, along with Céline Dion, 55, being escorted by security to their seats.

In a 4-second clip uploaded to TikTok, audience members can be heard gasping and pointing while attempting to snap pics of Harry, 39, and Markle, 42.

“Katy getting A-list support,” commented one fan.

Dion went to the concert with her 13-year-old twin sons, Eddy and Nelson.

Perry’s show marks the second time the “My Heart Will Go On” singer has been seen in public since revealing her diagnosis of stiff person syndrome in December 2022.

Dion attended Monday’s hockey game between the Vegas Golden Knights and the Montreal Canadiens.

Orlando Bloom, who is engaged to Perry, came to the concert with the couple’s 3-year-old daughter, Daisy.

In a clip posted to X, the “Pirates of the Caribbean” star, 46, can be seen dancing to Perry’s “Chained to the Rhythm” while holding the tot.

The support from the Sussexes comes after Perry, 39, and Bloom supposedly struck up a close friendship with the couple after they moved to their Montecito home in 2020, according to People.

“Just two days ago, Orlando Bloom sent me a message — because he’s just down the road and we sort of keep in contact,” Harry said in 2021 while appearing on “The Armchair Expert” podcast.

Harry shared that the “Lord of the Rings” star warns him whenever members of the media are close by.

Perry’s residency in Vegas began in December 2021 and was frequently extended to meet demand.

This is not the first time she has performed for royalty.

In May, the “California Gurls” singer took the stage at the coronation concert honoring King Charles III, 74.

The “I Kissed A Girl” hitmaker belted her iconic tunes in a metallic Vivienne Westwood gown.

Since then, she and Bloom have weathered backlash for allegedly evicting a dying veteran from his home.

It’s the latest in a string of legal battles for the “Firework” performer.