Other members of the Royal Family had already been seated, as they arrived before the Queen.
Other celebrity guests at Eugenie's wedding included Demi Moore, supermodel Naomi Campbell and Australian star Holly Valance.
But royal fans waiting to see the carriage procession expressed their “frustration” that there are no screens outside streaming the ceremony.
Well-wishers who have gathered on Windsor High Street to catch a glimpse of the couple are watching the ceremony on their mobile phones.
Debbie Skelton-Bethell, 52, from Shropshire, said: “It would have been nice to have screens outside of the castle, there’s supposed to be speakers but I don’t think they’ll reach out here.”
Ms Skelton-Bethell arrived at 8.30am this morning to catch a glimpse of the wedding procession.
She added: “I’m most excited to see the bride in her dress!”
British fashion and portrait photographer Alex Bramall was named as the official photographer by Buckingham Palace on Friday morning.
“It is an honour and a privilege to be invited to photograph Princess Eugenie and Jack on this most special of days,” Mr Bramall said.
“I look forward with great excitement to capturing this significant occasion and wish them both a happy future together.”