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2012 Olympics: London's star-studded audience for the opening ceremony

LONDON, ENGLAND - JULY 27: Prince William, Duke of Cambridge (L) and Catherine, Duchess of Cambridge attend the Opening Ceremony of the London 2012 Olympic Games at the Olympic Stadium on July 27, 2012 in London, England. (Photo by Toby Melville - IOPP Pool /Getty Images)
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Prince William and Catherine, Duchess of Cambridge, attend the Opening Ceremony of the London 2012 Olympic Games on July 27, 2012 in London.
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(CBS/AP) There will be monarchs, presidents, prime ministers, plus David Beckham and the cast of "Downton Abbey" at Friday's opening ceremony for the London Olympics.

Among the 60,000 spectators at Olympic Stadium there will be royals, including Queen Elizabeth II, who will open the Games, along with Prince William and his wife, Kate, and Prince Harry.

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There will also be A-listers from Hollywood, including Brad Pitt and Angelina Jolie, recently filming in Britain.

British movie star Orlando Bloom stopped to take pictures with British soldiers and fans outside the stadium.

"I'm a big fan of Danny Boyle, so I'm excited to see what he's done!" Bloom said. Boyle, an Oscar winning director, is mastermind of the three-hour show.

Actor Hugh Bonneville, who plays aristocrat Lord Grantham in the costume drama "Downton Abbey," tweeted a picture of his fellow cast-members arriving at the stadium.

The British government says more than 80 heads of state and government will be in the audience, including royalty from Brunei, Luxembourg, the Netherlands, Spain and Sweden.

The U.S. will be represented by first lady Michelle Obama, and Republican presidential hopeful Mitt Romney will also attend.

Beckham, who helped bring the games to London and actually accompanied  the Olympic  flame to the country from Greece,  has said he has a role in the ceremony.

"Today is going to be an amazing moment," Beckham said Friday.

British newspapers also have speculated that boxing great Muhammad Ali may be involved.

The show, a 27 million pound ($42 million) spectacular titled "Isles of Wonder," will end with a performance by Paul McCartney.