According to reports from United Kingdom newspapers, the proud parents have planned 48 hours of celebrations for their youngest daughter and her new husband at the York family home, Royal Lodge in the grounds of Windsor.
"One particular passage in which Jay Gatsby is described reminded her immediately of Jack", Conner said.
Prince Harry, 34, and Meghan Markle, 37, Prince William, 36, and Kate Middleton, 36, were there, as was Harry and William's father, Prince Charles, 69.
Kate, who regularly wears Alexander McQueen dresses to important royal events, paired the dress with a Philip Treacy hat.
The princess has spoken of the importance of showing "people your scars" and is a patron of the Royal National Orthopaedic Hospital Appeal.
The bride's mother, Duchess of York Sarah Ferguson, was visibly excited as she exited her vehicle, wearing a bright green dress from a local Windsor clothing company, Emma Louise Design.
Meghan wore a Givenchy coat and dress with a Noel Stewart hat.
Siblings Princess Charlotte, 3, and Prince George, 5 - who are Prince William and Catherine's children - reprised their roles as bridesmaid and page boy and were on their best behavior. The queen will then host a reception at the castle.
Prior to the big day, Eugenie spoke with ITV about her decision. "It's so good for you that you could swim every day - as long as you don't overexert yourself - right up until the end of the third trimester". Charity guests and 1,200 members of the public have been invited into the grounds for the occasion.