Hollywood's elite have joined Britain's who's who to celebrate the marriage of Princess Eugenie and long-time partner Jack Brooksbank in a ceremony which has included a fall, flying hats and breaks from tradition.
Eugenie - ninth-in-line to the throne - wore a long-sleeved gown by British designers Peter Pilotto and Christopher De Vos, an emerald-encrusted tiara borrowed from the Queen and no veil.
The granddaughter of the Queen arrived at Windsor Castle's St George's Chapel in a 1977 Rolls Royce Phantom VI, accompanied by her father, Prince Andrew, the Duke of York. Her mother, Duchess of York, Sarah "Fergie'' Ferguson arrived earlier with eldest daughter Princess Beatrice, who was dressed in royal blue as maid of honour.
The star-studded ceremony of 850 guests included Naomi Campbell, Demi Moore, Ellie Goulding, Liv Tyler, Kate Moss, Ricky Martin, Jimmy Carr, Pixie Geldof, Cara Delevigne and James Blunt.
Stephen Fry, Downton Abbey writer Julian Fellowes, Holly Valance, Prince Harry's ex Chelsy Davy and retired footballer Jamie Redknapp are also there.
The couple's guests' arrivals provided much entertainment for onlookers as they held onto their hats while entering the chapel with the wind threatening to blow them away.
The bride's mother, the Duchess of York Sarah "Fergie" Ferguson, proved to be a hit with the crowd when she got out of her car on arrival at the chapel and promptly walked towards the crowd to give a couple of people a hug before dashing back towards the chapel.
Their six bridesmaids and two page boys included Princess Charlotte and Prince George, the eldest children of Eugenie's cousin Prince William and wife Kate, as well as Theodora Williams, daughter of singer Robbie Williams, who attended with wife Ayda Field.
Eugenie's cousin Lady Louise Windsor was a special attendant who helped wrangle the children, one of whom, Louis Givenchy, had an unfortunate trip on the steps up to the chapel.
Kate's pregnant sister Pippa Middleton attended, in a forest green Emilia Wickstead dress and coordinating hat, with husband James Matthews and brother James.
Prince Harry and new wife Meghan were back at the chapel where they married in May. Meghan wore a demure navy dress by Givenchy.
The Queen, dressed in powder blue, attended with Prince Philip, who it was earlier reported would leave it up to the last minute to decide whether he would attend.
Prince Charles attended alone as wife Camilla had a prior engagement in Scotland.
Italian singer Andrea Bocelli sung Ave Maria and Panis Angelicas by St Thomas Aquinas.
Brooksbank, 32, is a drinks industry executive and ambassador for George Clooney's tequila company, while his 28-year-old wife is an associate director at art gallery Hauser & Wirth.
Before his then soon-to-be wife arrived at the alter, the groom had prescription glasses on. He promptly took them off minutes before the bride arrived.
Two readings were given at the ceremony; including one taken from The Great Gatsby and read by the bride's sister and Maid of Honour, Princess Beatrice.
Following the ceremony, the newly weds were greeted with cheers of joy from members of the public outside.
As the couple stood at the top of the chapel stairs, they gave each other a kiss - much to the delight of the crowd.
The couple - who shared several special moments during the ceremony - then stepped into a carriage for a short procession.
On the eve of their big day, Princess Eugenie told local media how excited she was to be marrying the love of her life and said she would be "running down the aisle.''
In an interview on the eve of the royal wedding, the Queen's granddaughter said she was nervous but couldn't wait to exchange vows with drinks industry executive Jack Brooksbank, 32, because "it was love at first sight", the Daily Mail reported.
"I remember being like, 'I really, really like this guy, I really want him to like me too,' and then you gave me this huge windscreen wiper wave and that was it, right, he likes me."
Jack described his bride-to-be as a "bright shining light," while Eugenie said: "Jack's the kind of guy, you know when you're lost at a party and you can't find anyone to talk to, and you start panicking and you need help?
"He'll walk in and make everyone feel so special. He'll scoop you up and talk to you and make you feel a million dollars and that's you, and you're so humble and generous."
The couple both said they immediately knew they wanted their siblings to be best man and maid of honour - Jack's brother, Tom, for him and Princess Beatrice for her.
Eugenie said: "She's my big sissy - I've looked up to her my whole life. I've wanted to be her at times, we've fought over Converse trainers and who gets what... and you know, we're best friends and I can't think of anyone I'd want by my side more than her.
"She's the biggest supporter of 'Team Eug and Jack' and so it's a great honour for me that she said 'yes' and she's doing that duty."
Eugenie said the whole experience of such a big wedding was "nerve-wracking and a bit scary."
As it happened: