Princess Eugenie, the granddaughter of Queen Elizabeth II, is set to marry tequila company executive James Brooksbank on Friday morning, but the second royal union of the year seems to have less interest than Prince Harry and Meghan Markle's May celebration.
Eugenie was determined to make sure her lavish wedding bash was bigger and better than Meghan's May nuptials.
The service will be led by the Right Reverend David Conner, Dean of Windsor, who will be accompanied by the choir of St George's Chapel, along with musicians from the Royal Philharmonic Orchestra and opera singer Andrea Bocelli.
The newlyweds will then depart on a short carriage procession around Windsor.
Eugenie, ninth-in-line to the throne, works in the art world while her fiance, a former manager of popular London nightclub Mahiki, works in the drinks and hospitality industry.
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The bride's sister, Princess Beatrice, 30, has been confirmed as the maid of honour, while Jack's brother Thomas Brooksbank will act as best man.
"Although Princess Eugenie's engagement ring is reminiscent of Catherine's with the large centre sapphire and diamond surround, it's a classic design for a royal engagement ring and not likely an intentional similarity", royal commentator Eloise Parker said.
The luncheon with the queen is expected to be a quiet, muted affair - reflecting the 92-year-old monarch's advanced years - with the nighttime shindig seen as a chance for the younger generations to step out in style.
"I'm not stressed at all", Eugenie told Vogue magazine for its September issue.
About 38,000 people signed a petition, organised by campaign group Republic, against taxpayers' money being spent on the occasion. It has criticized the royals for using weddings as "PR exercises" and expecting taxpayers to pick up part of the tab.
"Britain's top-selling Sun newspaper ran a front page story on Wednesday with the headline "£2m too much for Eugenie wedding", saying the event could have been held at a chapel near her childhood home.