Duchess Sophie braved the surprisingly chilly weather on Friday as she made her way to the Royal Windsor Horse Show 2026. Looking the picture of elegance, the royal donned a ‘Sloane Ranger’ coded outfit, consisting of a pair of barrel jeans, a structured tweed blazer, and she added a feminine edge with a floral blouse, which had a pie-crust neckline. The pie-crust neckline has long been associated with the royal family, thanks to the late Princess Diana. © PA Images via Getty ImagesThe Duchess of Edinburgh looked so chic in her latest look King Charles’ former wife wore the pie-crust blouse often in the 1980s. The mother of Prince William and Prince Harry was often seen sporting the style with a skirt suit, midi skirt, or pinstripe trousers. © PA Images via Getty ImagesDuchess Sophie wore a pie-crust blouse Diana often sported the pretty frilled collar, most memorably while styled with an outfit by Caroline Charles in 1983, and she also teamed the ruffle-neck style with a Jasper Conran look in 1981. Princess Diana made the pie-crust neckline …