Place your royal wedding bets: Website offers odds on surprise American guests
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A gambling website is taking bets on whether famous political figures — including President TrumpDonald John TrumpFacebook releases audit on conservative bias claims Harry Reid: 'Decriminalizing border crossings is not something that should be at the top of the list' Recessions happen when presidents overlook key problems MORE and Hillary ClintonHillary Diane Rodham ClintonThe exhaustion of Democrats' anti-Trump delusions Poll: Trump trails three Democrats by 10 points in Colorado Soft levels of support mark this year's Democratic primary MORE — will be surprise guests at the royal wedding.

The site, BetDSI, also allows those feeling lucky to wager on whether former President Obama will be at the Saturday nuptials of Prince Harry and Meghan Markle at Windsor Castle in England.

Among American politicians, oddsmakers say Trump is the least likely to attend the royal shindig. But bettors who take a chance on the commander in chief being there stand to make 25 times their money if he is.

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Obama and Clinton have the same odds as each other, 3.5 to 1 — still not favored to be among those watching in person as Harry and Markle take the plunge.

But there’s at least one American who is widely expected to make the cut: Oddsmakers are betting that tennis champ Serena Williams is far more likely to attend than not, with bettors standing to only make 2 percent on their return if Williams does come.

Obama and former first lady Michelle ObamaMichelle LeVaughn Robinson ObamaJuan Williams: Democrats finally hit Trump where it hurts Michelle Obama to present Lin-Manuel Miranda with the Portrait of a Nation Prize Michelle Obama thanks her high school for naming new athletic complex after her MORE — who have formed a seemingly close relationship with Harry, the sixth in line to the British throne — “will not be attending” his wedding to the California-born Markle, ITK was told last month.

And it appears unlikely that Clinton or Trump will be there for the royal event either.

"It has been decided that an official list of political leaders — both UK and international — is not required for Prince Harry and Ms. Markle's wedding," a Kensington Palace spokesman told ITK in April. "Her Majesty's Government was consulted on this decision, which was taken by The Royal Household."

BetDSI isn't stopping the House of Windsor gambles with celebrity guests, however. Gamblers can also place wagers on everything from the length of the happy couple's first kiss as man and wife to which designer Markle will wear on her wedding day.