She was led down the aisle by her father, Prince Andrew.
Eugenie's nuptials had much of the same pomp and pageantry as Harry's, but the grandeur for a "minor royal" attracted some criticism.
Robbie Williams and Ayda Field arrive.
The wedding day wind proved to be quite a challenge for numerous guests, with hats and hemlines flying all over the place but it only added to the excitement of the day!
Wearing a Peter Pilotto and Christopher De Vos gown, the 28-year-old stunned onlookers as she entered Windsor Castle.
She broke with tradition, opting to go without a veil and arriving at the chapel with her face in full view and the Greville emerald tiara on show.
The couple, while showing clear signs on nerves, beamed happily during the hour-long service. The designers were waiting at the steps of the church to fix the train after Eugenie got out of the auto.
Competitors BBC and Sky News showed snippets of the wedding and the crowds thronging the streets of Windsor outside the castle.
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"Trade from Great Britain into Northern Ireland would be in danger of restriction". It must be one of the worrying questions for Downing Street.
The wedding featured a live performance from opera singer Andrea Bocelli.
The couple are famously well travelled having met whilst skiing in Switzerland and Jack popping the question while on holiday in Nicaragua.
William and Kate's 5-year-old son, Prince George, served as a page boy, and their daughter, 3-year-old Princess Charlotte, was one of six bridesmaids.
One noticeable absentee was Camilla, the Duchess of Cornwall, the wife of heir-to-the-throne Prince Charles, as she was carrying out an engagement in Scotland.
Guests binged on gourmet pizza and Casamigos tequila at the afterparty.
Former "Take That" star Williams and his wife Ayda Field are friends with Eugenie and her sister Princess Beatrice.
Security around Windsor was tight, with airport-style security checks and large numbers of police. "The designers undertook archive research into previous dresses worn by Members of the Royal Family and identified a silhouette".