'Star Wars: The Last Jedi' spoilers: Here's how Tom Hardy and the British royals will make their cameos

Tom Hardy in "Mad Max: Fury Road" Facebook/ Mad Max Movie

Rian Johnson's "Star Wars: The Last Jedi" may be one of the franchise's most star-studded installments yet. The upcoming film will not just feature one or two celebrity cameos. Instead, it will have four, two of which will be British royals.

Prince Harry and Prince William previously visited the set of Episode VIII, which was shot primarily in England. They were reportedly playing with lightsabers. This sparked rumors that they may appear on-screen, which turned out to be true.

John Boyega, who plays Finn in the film, just recently confirmed to The Hollywood Reporter during its Actor Roundtable that the royal brothers will indeed grace "The Last Jedi" in a scene shared with Boyega himself. However, they are not the only ones appearing in that particular scene. "Mad Max: Fury Road" star Tom Hardy and singer-songwriter Gary Barlow will be there too, under helmets, of course.

All four guest stars will appear as Stormtroopers in an elevator scene, guarding the First Order soldier-turned-Resistance fighter. It is unclear if the guest stars would say or do anything to help audiences figure out which celebrity is under which helmet.

Boyega described the experience as "a strange contrast of family." Although appearing alongside real-life royalties is intimidating, he said it was more "fun" than scary.

"It was a great experience," he told the publication. "You're a child. There's a new planet every day and a new scene to play. It makes you feel like you're a part of history in a sense."

The four men are not the first to make cameos in the epic space opera saga. In 2015's "The Force Awakens," Daniel Craig suited up as the Stormtrooper manipulated by Rey (Daisy Ridley). Carrie Fisher's real-life daughter, Billie Lourd, also shared a scene with his mom as a member of the Resistance.

"Star Wars: The Last Jedi" is slated to open in cinemas on Dec. 15.

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