Keep an eye on the mailbox - Britain's Prince William and bride-to-be Kate Middleton have sent out invites to their hotly anticipated royal wedding to around 1,900 guests, The Associated Press reports.

Military personnel and charity workers will mingle with European royalty, diplomats and the family and friends of the couple at the Westminster Abbey ceremony on April 29, St. James's Palace said yesterday.

Queen Elizabeth II and the Duke of Edinburgh will lead a group of 50 members of the British royal family at the wedding, while around 40 representatives of foreign royal families - likely to include dignitaries from Spain, Sweden, Norway, Denmark and Greece - will also attend.

What's not yet known is whether celebs including singer Elton John - a friend of William's mother Diana, the Princess of Wales - or Kanye West, a favorite of the prince, are among those who'll receive a prized invite.

Britain's Sunday Express newspaper reported that footballer David Beckham and his wife Victoria are on the royal guest list.

William worked with Beckham on England's failed bid to win the right to host the 2018 World Cup.

One guest already ruled out is Sarah Ferguson, the Duchess of York, the ex-wife of William's uncle Prince Andrew.

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