Robbie and Ayda have always kept Teddy away from the spotlight but on Friday she was front and centre as she joined other members of the bridal party including Prince George and Princess Charlotte in walking down the aisle.
The A-list guests included Hollywood stars Demi Moore and Liv Tyler, fashion luminaries Kate Moss and Naomi Campbell and pop singer Robbie Williams, whose daughter was a bridesmaid.
Eugenie's sister, Princess Beatrice, will read a passage from "The Great Gatsby".More news: Canada's goals well below what's needed to stop catastrophic climate change
There had been doubts about whether the 97-year-old Philip would be well enough to attend, but he seemed to be in good form during a rare public appearance.
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. "The whole floral design team and I wish Princess Eugenie and Jack our heartfelt congratulations and we hope they have a magical Wedding day". She works in the art world. The couple, who had dated for seven years, got engaged in January when Brooksbank, 32, proposed during a trip to Nicaragua.
The queen will host a champagne luncheon for the newlyweds shortly after the ceremony.More news: Gathering strength, Hurricane Michael heads for Florida
"I think you can change the way beauty is, and you can show people your scars and I think it's really special to stand up for that".
They will then take an open-top carriage ride through Windsor, although it will be shorter than the one Harry and Meghan took in May.
"It's very nerve-wracking because you want it to be flawless, but then you realise that you're going to be with the person you love forever and nothing else really matters".
In the above photos, Sarah poses for a dramatic profile shot, enveloped in a luxe, ruffled shawl and can also be seen strutting her stuff on a runway, sporting a stunning ruby gown.More news: Modric v Ronaldo rematch as Ballon d'Or nominees unveiled
ITV will be showing a 30-minute highlights programme at 8pm, called The Royal Wedding: A Family Celebration.