So it is brave indeed of Kate Middleton to extend an invitation to Victoria Beckham.
The former Spice Girl and her husband, David, are among the celebrities invited to the wedding of Miss Middleton and Prince William at Westminster Abbey on April 29. They were two of the 1,900 guests who found a gold-embossed invitation on their doormat at the weekend.
The Beckhams are invited on account of David's work with Prince William on England's 2018 World Cup bid. The Prince is president of the Football Association and the pair spearheaded the bid at a presentation in Zurich last year.
A spokesman for the footballer declined to confirm the invitation, but sources said the couple had received one. Mrs Beckham, now a fashion designer of note, has stolen the limelight at weddings in the past. In 2006, she arrived for the Italian nuptials of Tom Cruise and Katie Holmes in a revealing strapless dress and enormous hat, to the delight of the paparazzi.
While Clarence House insisted that the wedding will not be a celebrity-studded affair, there are plenty of famous names on the list.
They include Ben Fogle, the television presenter, and his wife, Marina, who are personal friends of the Prince and Miss Middleton.
Sir Elton John and Joanna Lumley are also expected to attend the ceremony. Sir Elton performed at the funeral of Diana, Princess of Wales and was chosen to end the Concert for Diana organised by her sons in 2007. Miss Lumley is a supporter of the Tusk Trust, the wildlife conservation charity of which Prince William is patron, and is a friend of both the Prince of Wales and the Duke of Edinburgh.
More outlandish suggestions yesterday included Kanye West, the US rapper who is one of the Prince's favourite recording artists.
Away from the celebrity, there are some other tricky guest list issues.
It is understood that the King of Bahrain was invited several weeks ago, when crowned heads of state were sent "save the date" messages by fax. Since then, the Gulf state has descended into turmoil with protests against the ruling Al Khalifa dynasty.
The King of Saudi Arabia, The King of Jordan, the Crown Prince of Abu Dhabi, the Sultan of Oman and the Sultan of Brunei are also said to be on the list at the personal invitation of the Queen.
The news dismayed Republic, the anti-monarchy pressure group. Campaign manager Graham Smith said: "It beggars belief that the Queen saw fit to invite the King of Bahrain just days after his troops opened fire on pro-democracy protesters. This sends a very strong signal that the British royal family's number one priority is other royals, even if they are dictators, despots and thugs.
"It is clear that the British people strongly support the struggle for democracy in the Middle East - this is a catastrophic error of judgment that is likely to prompt a fierce backlash. We are calling on Clarence House and the Government to withdraw these invitations immediately."
The 1,900-strong guest list includes more than 1,000 friends and family of the Prince and Miss Middleton. There will be 200 members of the Government, Parliament and diplomatic corps. David and Samantha Cameron have been invited to the ceremony and Buckingham Palace reception, while Ed Miliband has received an invitation to the ceremony only. Around 80 representatives of the Prince's charities will also attend.
There was no word from the White House on whether Barack and Michelle Obama have been invited, but it is thought unlikely. As the Prince is not yet heir to the throne, the wedding is not classed as a state occasion and protocol dictates that elected foreign leaders should not expect an invitation.
The Duchess of York is definitely not on the list. A spokesman said she "was never expecting to attend" and plans to be overseas on April 29.
The invitations, with a dress code of "uniform, morning coat or lounge suit", where sent out by first class Royal Mail.
I may have to make a trip home when they come to visit Canada....