Organisers have invited members of swingers' groups to take part and have also held talks with adult film makers to record an "alternative" wedding video on the wedding day, the 'Daily Express' reported.
The dress code for the risque demonstration, which is being organised by anti-establishment groups like Lunarchy, Sluts Against Cuts and members of the International Union Of Sex Workers, is simply balaclavas for men and balaclavas plus red lipstick for women, the report said.
Members of a group called Meltdown, which organised the G20 demonstrations, are in charge of recruiting swingers and producing a blue movie of the event.
"The top police are saying they're enforcing a ring of steel, a sterile zone, around the route of the royal procession. They are making it clear they want absolute monarchy on the day, a highly controlled Royal production, policed militarily with snipers on the roof.
"The last thing you want at a Royal Wedding is sterility. You want the opposite, fertility. You can't plan an orgy, but that's what we intend. It's going to be a very sexy event," ringleader Chris Knight was quoted as saying.
Knight, who was sacked from his university post after claims of inciting violence at the G20 demonstrations in 2009, has also revealed plans to hold a carnival-style street party near the ceremony in a bid to obstruct the police.
He said: "There's lots of young people turning up so it'll be sexy. One hundred and eighty people have signed up to the Facebook page for it already."
Metropolitan Police Commander Bob Broadhurst insists the wedding will be policed by a "ring of steel".
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