Gay marriage activists ask William and Kate for support (VIDEO)

Gay rights activists are calling on Prince William and Kate Middleton to "express their support" for same-sex marriage, according to reports.

Human rights campaigner Peter Tatchell delivered a gigantic wedding card to Buckingham Palace which, according to the website of Chicago Gay Pride, read: "Congratulations William and Kate on your Wedding Day. We wish you a happy life together. You can get married, gay people can't. We are banned by law. We ask you to support marriage equality. Equal=Love."

Gay marriage supporters have put together a waved pink Union Jack flags as the giant card, part of the so-called Equal Love campaign, was unveiled.

Tatchell said he hoped the royal couple would "find a way" to back the protest.

Some of the eight same-sex couples who in February filed an application in the European Court of Human Rights to end the legal prohibitions on same-sex marriage and opposite-sex civil partnerships were also present, according to the U.K. Press Association.

Tatchell reportedly said: "We're here to send our best wishes to William and Kate. We wish them a happy wedding day and a happy married life together. Kate and William are lucky — they can get married. Gay couples can't — not fair. In a democratic society marriage should be open to everyone."

He reportedly added: "I'm sure Kate and William have gay and lesbian friends. I'm sure they wouldn't wish to see them discriminated against."

Tatchell also criticized the decision to invite several "royal tyrants" to the wedding. Although the Crown Prince of Bahrain is no longer attending, Tatchell described his original invite as "truly shocking".

Among those who will be attending is prominent gay icon Elton John, who sang the song "Candle in the Wind" at the funeral for Prince William's mother Princess Diana, killed in a car crash in Paris in 1997.

Gay activists have launched a legal bid to overturn the bans on same-sex civil marriages and heterosexual civil partnerships in the U.K.

Meanwhile, a member of the elite Scots Guard has been removed from duty for Friday's royal wedding after ranting about Kate Middleton on his Facebook page, the Daily Mail reports.

Cameron Reilly, 18, in a rant that turned racist, railed against the future princess after he felt she had snubbed him. 

“Her and William drove past on Friday and all I got was a ****y wave while she looked the opposite way from me, stupid, stuck-up cow. Am I not good enough for them! Posh b****. Who really gives a f*** about her?” he wrote, according to the newspaper.

A spokesman for the Scots Guards told the Daily Mail they were now investigating claims against Reilly, who regularly patrols Buckingham Palace and had been assigned to guard the royal wedding. 

His Facebook reportedly also contained this entry: "Watching a massive Jew gathering at the Tower of London! Have never seen so many rabbis in my life…"  to which a friend replied: “Get the rifle out…”

The Daily Mail says Reilly also described London as a “Paki holding cell.”