It’s the parlor game that’s obsessed London: Which royal invited Rebel Wilson to an orgy?

Royal rabble rouser Rebel Wilson has the highest echelons of English society trying to figure out which aristocrat took her to an orgy.

Well-placed London sources say it’s become a bit of a parlor game, with everyone guessing who allegedly invited the “Pitch Perfect” star to a tech billionaire’s party with drugs and sex on offer.

In her new memoir, “Rebel Rising,” Wilson writes that a minor royal — “who’s like fifteenth or twentieth” in line to the British throne — allegedly invited her to the 2014 bash, held at a ranch just outside Los Angeles, “last minute,” saying they needed more women.

Wilson (front) rang in 2020 with Princess Anne’s daughter, Zara Phillips (behind Wilson), and Phillips’ husband, Mike Tindall (far right).

The theme was medieval, so the actress — who is friends with Princess Anne’s daughter, Zara Phillips, and has hung out with Prince Harry — came dressed in a “buxom damsel outfit complete with cone hat.”

However, Wilson ran for the hills when she was offered a tray of candy only to discover it was, in fact, the party drug molly, aka MDMA.

Wilson (far left) cuddled up to Prince Harry at the Santa Barbra polo club in May 2022, alongside her fiancée Ramona Agruma (far right). Rebel Wilson/ Instagram

Wilson, 44, is keeping quiet on the identity of her royal pal, according to friends. 

Multiple people in and around the British royal family have been associated with drugs over the years.

Most famously, Prince Harry admitted in his book, “Spare,” to having taken cocaine, cannabis and magic mushrooms.

In 1999, Queen Camilla’s then-24-year-old son, Tom Parker Bowles, was caught giving cocaine to a journalist while working at the Cannes Film Festival in France — and reprimanded by King Charles.

Lord Frederick Windsor, the second cousin to King Charles, was once pictured snorting cocaine. He lived in West Hollywood for seven years with his actress wife, Sophie Winkleman. WireImage

Lord Freddie Windsor, the son of Prince and Princess Michael of Kent and second cousin to King Charles, was pictured snorting cocaine at a London nightclub back in 1999, when he was 22.

He later moved to Los Angeles with his wife, British actress Sophie Winkleman, best known for her role in “Two and Half Men.”

Windsor, now 53rd in line to the throne, and Winkleman moved back to the UK before the birth of their second child in 2016.

Other royals have caused mischief in the US.

Tom Parker Bowles, the son of Queen Camilla, was caught giving cocaine to a journalist in 1999. David M. Benett

Zara Phillips’ husband, Mike Tindall, racked up a $20,000 bar bill at LIV nightclub in Miami in June 2011, while on his bachelor trip with brother-in-law Peter Phillips.

There is no evidence that any of the royals named above invited Wilson to the party, but that hasn’t stopped people from guessing.

One source familiar with California tech-bro orgies told Page Six they were not surprised by Wilson’s claims.

Wilson, seen here holding a photo of Queen Elizabeth, said the royal in question was “like fifteenth or twentieth” in line to the British throne. Rebel Wilson/ Instagram

“The way it would happen is, it would start out as normal, just with way more women than men, which was very unusual for a tech party,” the source said,

“Then molly would start coming out.”

It was previously reported that Tesla billionaire Elon Musk attended wild tech-scene parties — including one where he wore a black armor-like costume adorned with silver spikes and chains.

Tesla billionaire Elon Musk once wore a black armor-style outfit to tech-bro sex party. Getty Images for Prime Video
Musk boogied down at a rave in Cabo San Lucas, Mexico, in May 2023. RolfDKruger/Twitter

In her 2018 book, “Brotopia,” author Emily Chang wrote about Silicon Valley’s “secretive, orgiastic dark side.”

Chang described a “party on the edge of the world,” hosted by venture capitalist Steve Jurvetson at his beachside home outside San Francisco in June 2017, where guests included Elon Musk and Google co-founder Sergey Brin.

At it, one venture capitalist, dressed as a bunny, offered a woman molly.

Google co-founder Sergey Brin was a guest ata techo-bro sex party, according to Emily Chang’s book “Brotopia”. FilmMagic

“They said it will just make you feel relaxed and you’re going to like being touched,” the woman told Chang.

According to the author, a select group of unidentified Silicon Valley “Technorati” used to gather monthly for a “drug heavy, sex heavy party”‘ at mansions in San Francisco’s Pacific Heights or the foothills of Atherton or Hillsborough.