Royals Royal Maid of Honor! See Princess Beatrice Arrive at Sister Princess Eugenie's Wedding Princess Beatrice made her entrance alongside her mother, Sarah Ferguson, the Duchess of York By Maura Hohman Published on October 12, 2018 06:39 AM Share Tweet Pin Email The royal maid of honor has arrived! Princess Beatrice arrived at the royal wedding of her sister Princess Eugenie to Jack Brooksbank alongside her mother, Sarah Ferguson, the Duchess of York, at St. George’s Chapel in Windsor Castle on Friday. Beatrice, 30, wore a deep royal blue dress by Ralph & Russo — a surprising choice since the bride’s right-hand woman has worn ivory in previous royal weddings. She accessorized with a thick headband-style fascinator in shades of purple by Sarah Cant. Eugenie, 28, revealed Beatrice would be her maid of honor in an interview with British Vogue in August. “Euge is amazing,” Beatrice said, adding, “She’s a very modern bride.” STEVE PARSONS/AFP/Getty Images Press Association via AP Images Eugenie and Jack exchanged vows at St. George’s Chapel — the same venue where Eugenie’s cousin Prince Harry wed Meghan Markle in May. Press Association via AP Images The couple will also be feted by a lunch hosted by Queen Elizabeth, 92, at Windsor Castle and then a black tie evening reception at Royal Lodge. Max Mumby/Indigo/Getty Why Meghan Markle and Prince Harry Might Miss a Big Part of Princess Eugenie’s Wedding RELATED VIDEO: Princess Eugenie Arrives at Her Royal Wedding Around 800 guests attended Friday’s celebration, with several celebrities — including Naomi Campbell, Cara Delevingne and Ellie Goulding — in attendance. Can’t get enough of PEOPLE’s Royals coverage? Sign up for our newsletter to get the latest updates on Kate Middleton, Meghan Markle and more! Princess Eugenie/Instagram On Saturday, the party will continue with a festival-style event complete with a fairground and food stalls. Despite claims that the Queen’s cousin, party planner Lady Elizabeth Anson, was involved in the castle reception on Friday, a source told PEOPLE that it’s the couple who are “running the show,” as a friend put it. “It is Eugenie and Jack’s party and they are very much involved in all the details and decisions,” the source added.