Prince Harry's Best Bud Exposed As Gay Porn Superstar!

Buckingham Palace has been rocked with a sizzling new sex scandal: A royal horse cavalry guard who escorted Harry and Meghan on their wedding day is one of Britain's busiest gay porn actors!

As a member of The Household Cavalry, Dan Broughton is a prominent member of the plumed and gold-helmeted mounted royal escort. His unit accompanied the newly married couple's white horse-drawn carriage through Windsor's streets following their sumptuous May 19 wedding.

It's never been a secret that Broughton is gay. In fact, he's believed to be a pal of Harry, who "has even described Dan as his 'GBF' — gay best friend," a royal insider noted.

But RadarOnline.com can now reveal Dan has been hiding a sensational secret from his royal benefactors — he is also a gay porn star known as Dirty Danny!

RadarOnline.com has learned the Internet is littered with explicit Dirty Danny videos filled with downright jaw-dropping content.

"A total charmer," teased Broughton's description on the gay website UKNakedMen.com. "It's not just lust when you meet Daniel Broughton, you will fall a teeny bit in love."

"He's from the north of England, they're friendly up there," reads the site. "He's flirtatious, completely versatile and has a bit of a thing for older guys and straight boys."

Below that is a video gallery of shocking clips revealing Danny locked in all manner of wild sexual acts.

Sources said Dirty Danny is also one of the most popular names on sites like men.com and English Lads.

Behind palace walls, Dirty Danny's sizzling sex revelations have the royal family agog.

"This is unthinkable," a royal insider said. "It's absolutely unprecedented that someone would so abuse the royal trust!"

Incredibly, Danny was candid on social media about his role in the royal wedding.

Hours before the ceremony, he uploaded a photo proudly showing himself with his cavalry equipment, which includes a plumed gold helmet, snazzy blue jacket and white gloves.

"Busy day tomorrow…kits ready #royal wedding," he wrote.

A week later, he was still referencing Harry and Meghan's big day on social media. "Playing out in Windsor. What a difference a week makes. Out with no helmet or sword. #royalwedding," he shared.

Besides its ceremonial role, The Household Cavalry also serves as Queen Elizabeth's official bodyguard.

It's unclear if Dirty Danny had ever personally guarded the queen — but he has stood at attention in hundreds of porn videos since he was named Mr. Gay UK 2007, a title he still proudly boasts of on his Twitter home page.

Besides identifying himself as a member of the British military on social media, he also describes himself as an "International Commercial and Erotica Model," as well as a "lover of space, geography and flight."

In an interview about his porn career, he said: "Each studio can be completely different, and I have something I like individually about each one."

Danny added: "I love working with Americans, and you can see that most of them really get turned on working with a Brit."