Royals Royal Parents' Night Out! Princess Beatrice and Edoardo Mapelli Mozzi Hit the Red Carpet in Style The couple, who welcomed daughter Sienna in September, attended a charity preview night of A Gallop Through History Platinum Jubilee celebration By Stephanie Petit Stephanie Petit Stephanie Petit is a Royals Writer and Reporter at PEOPLE. People Editorial Guidelines Published on May 12, 2022 12:22 PM Share Tweet Pin Email Edoardo Mapelli Mozzi and Princess Beatrice. Photo: Steve Parsons/PA Images via Getty Images Princess Beatrice is ruling the red carpet! Queen Elizabeth's granddaughter and her husband, Edoardo Mapelli Mozzi, were guests of honor at the Windsor Horse Show on Wednesday night, where they attended a charity preview of "A Gallop Through History," a celebration of the monarch's Platinum Jubilee year. In addition to hitting the red carpet — Princess Beatrice in a floral patterned gown by The Vampire's Wife (a brand also worn by Kate Middleton) and Edoardo in a velvet blazer and bow tie — the couple waved to the crowds as they rode off in a car. It was a rare parents' night out for the couple, who welcomed daughter Sienna Elizabeth in September. Princess Beatrice is also a stepmother to Edoardo's son, Christopher Woolf, from a previous relationship. Princess Beatrice and Husband Edoardo Team up with Swedish Royal Couple for Special Reason Princess Beatrice. Steve Parsons/PA Images via Getty Images Most of the monarch's 12 great-grandchildren will participate in a pageant at the Royal Windsor Horse Show on Sunday, according to a report in The Telegraph. The little royals will ride in a horse-drawn carriage as part of the "A Gallop Through History" gala performance to celebrate the Queen's 70 years on the throne. Expected to participate are Kate Middleton and Prince William's three children — Prince George, 8, Princess Charlotte, 7, and Prince Louis, 4. They'll be joined by Peter and Autumn Phillips' two daughters Savannah, 11, and Isla, 10; Zara and Mike's Tindall's three kids Mia, 8, Lena, 3, and Lucas, 1; Princess Eugenie and Jack Brooksbank's son August, 1; and Princess Beatrice's 7-month-old daughter Sienna with Edoardo. Princess Beatrice. PA Images/Alamy Stock Photo Queen Elizabeth's granddaughter Lady Louise Mountbatten-Windsor, 18, will also participate in the show. The daughter of Prince Edward and Sophie, Countess of Wessex will drive the carriage once owned by Prince Philip in tribute to her late grandfather, who died in April 2021 at age 99. Lady Louise has picked up the Duke of Edinburgh's passion for the sport, participating in competitions. Video footage previously emerged of the Queen's great-grandchildren practicing getting into the carriage at Windsor Castle, likely getting ready for Sunday's event. Princess Beatrice. Steve Parsons/PA Images via Getty Images The 96-year-old monarch's great-grandchildren will likely also participate in the variety of events over the first weekend in June, but they will not all appear on the Buckingham Palace balcony as is tradition for Trooping the Colour. The palace announced last week that only working members of the royal family will appear for the balcony appearance instead of the full extended royal family. Prince William and Kate's three children are expected to be there along with Prince Edward and Sophie's kids, Lady Louise and James, Viscount Severn. Can't get enough of PEOPLE's Royals coverage? Sign up for our free Royals newsletter to get the latest updates on Kate Middleton, Meghan Markle and more! Alamy Stock Photo In addition to the Jubilee weekend's events in England, some members of the royal family will travel to different areas of the U.K. Prince William and Kate are to visit Wales, where they lived for a few years when they were first married more than a decade ago, while Princess Anne heads to Scotland and Prince Edward and Sophie go to Northern Ireland.