Talk About Exclusive: 15 High-Profile Royal Wedding Guests

We definitely know Simon Cowell and the Obamas won’t be gracing the couple with their presence. However, the couple can bet on Elton John and his partner, David Furnish, showing up. He told People he would attend, though he wasn't quite sure why William gave Kate his mother's engagement ring.

The Peruvian fashion photographer snapped some of the most iconic portraits of Princess Diana, and last November he snapped Kate and Wills’ official engagement photographs. "They are in their prime and brimming with happiness,” he said afterwards. “I have never felt so much joy as when I see them together." Expect big ... smiles from him on April 29.

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Soccer star David Beckham and his wife, fashion designer and former Spice Girl Victoria Beckham, have also confirmed their plans to attend. They were reportedly invited because David worked with Prince William on London's Olympic bid.

The ‘Thorpedo’ is a five-time Olympic medal winner for freestyle swimming. His breakout performance was in the 2000 Sydney Games and he continued to dominate the swimming field until illness forced his retirement in 2006. The Australian has been a friend of William’s since the Prince began donating regularly to the ... swimmer’s charity, Ian Thorpe’s Fountain for Youth. The two were reportedly introduced at a charity event in 2010.

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Guy Ritchie has directed gritty pictures like Snatch and Lock, Stock and Two Smoking Barrels. But he'll have to enter the refined royal world on April 29, as he has reportedly been invited.

Chelsy, Prince Harry’s on-off girlfriend of seven years, has had a number of secret meetings with Harry in recent months, fueling speculation that they’re back together. In February, she spent a night out on the town with Pippa Middleton, Kate’s younger sister, and Princesses Beatrice and Eugenie. Looks like they will all ... share another laugh at the royal wedding.

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Funnyman Rowan Atkinson has also reportedly snagged an invitation to the Royal Wedding. It's certainly not his first brush with the royal set, as you can see, since he has hobnobbed with the likes of Camilla Parker Bowles at a royal charity event. Let's just hope he doesn't channel his inner, gaffe-prone Mr. Bean.

As for politicians? Of course, Prime Minister David Cameron (R) and Deputy Prime Minister Nick Clegg (L) have been invited. Opposition leader Ed Miliband wasn’t left off the guest list either. William has even invited a number of his aides, including his personal secretary, Jamie Lowther-Pinkerton.

The British soul singer blasted onto the UK music scene at the age of 16 with a multi-platinum-selling record, and her success has only blossomed in subsequent years. Prince William reportedly became close friends (and maybe more than that, as some speculated) with the singer in 2007 when she was invited to sing at the 2007 ... Concert for Diana, marking the tenth anniversary of the Princess of Wales’ death.

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Prince Charles brought Tiggy on as a nanny for the young princes following his separation from Diana in 1993. Tiggy courted controversy early on when she suggested she was more nurturing than their mother. "I give them what they need at this stage: fresh air, a rifle and a horse. She gives them a tennis racket and a bucket of ... popcorn at the movies." She became even more prominent in William’s life following the death of Diana, and was applauded for being one of his greatest sources of comfort.

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Holly, the daughter of billionaire entrepreneur Richard Branson, is one of Kate and William’s best friends. On April 21, just days before the royal wedding, she celebrated her engagement to a shipbroker at a party attended by Kate’s younger sister Pippa.

He’s been dubbed the black sheep of the Middleton family, but Kate’s uncle Gary has snagged a seat inside the Abbey. In 2009, undercover reporters filmed the 45-year old cutting up what appeared to be cocaine and boasting about his royal connections. The younger brother of Kate’s mother, he divides his time between his ... home in London, and a villa in Ibiza which he refers to as “La Maison de Bang Bang.”

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The deposed rulers haven’t been in power for nearly 40 years, but international law dictates they’re able to keep their titles as a courtesy. A 1974 referendum abolished the Greek monarchy in favor of a republic, and the two were sent into exile. The former king and queen took refuge in the London suburbs where they became ... close to the British royal family.

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The controversial and famously wealthy sultan has had three wives (often simultaneously), and lives in a palace with 1,888 rooms. In 1997, Miss USA filed a lawsuit in which she claimed the sultan had held her as a “sex slave” in his palace against her will. A Los Angeles judge threw out the case because, as a head of state, ... the sultan was protected under sovereign immunity.

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Lance-Corporal Compton served with Wills in the Household Calvary in Afghanistan. A Taliban ambush in 2006 left him with injuries so severe that he “died” three times en route to the hospital. Compton was burned over 75 percent of his body and remained in a coma for three months but has emerged as an inspirational war hero.