The Archbishop of Canterbury is among public figures congratulating...
Princess Eugenie is marrying her long-term partner Jack Brooksbank at St George's Chapel in Windsor.
The ninth in line to the throne was given away by her father, Prince Andrew who said his daughter's wedding has more guests than Harry and Meghan's - because she has so many friends.
He also told ITV that the Queen was certain about holding the nuptials at Windsor.
In a pre-recorded interview with Ruth Langsford and Eamonn Holmes, the father of the bride said that he was "not intimately involved in the planning".
And he said: "All the approval goes through the Queen anyway. It was what I was told, where it was going to take place.
"The Queen very firmly said: 'No, St George's is where you are going to have the wedding.'
"So I said: 'Aye, aye ma'am', turn to the right, salute and carry on."
Robbie Williams, Ellie Goulding and Kate Moss are among 850 guests who will be witnessing the wedding between the Queen's granddaughter and tequila brand ambassador Jack Brooksbank.
As with Harry and Meghan’s wedding, 1,200 members of the public have been given tickets to hear a broadcast relay of the ceremony from outside the chapel doors.
The senior cleric who will marry the couple, David Conner, the Dean of Windsor, said it had been a pleasure to work with princess Eugenie and her fiance in the run-up to their wedding service which will be a mix of "traditional and modern".
The dean, who will officiate when the couple make their marriage vows and give the address, has also been giving the pair the traditional pre-marital guidance counselling.
Speaking on the eve of the wedding, he said: "As a couple they come across as just the perfect couple.
"They are very natural with each other, they obviously love one another but they also have a lot of fun together and it's been a real pleasure to work with them."
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