The royal family is celebrating Commonwealth Day today.
King Charles III, Camilla, Queen Consort, and the Prince and Princess of Wales attended the annual Commonwealth Day Service held at Westminster Abbey this morning. They were also joined by the new Duke and Duchess of Edinburgh, the Princess Royal, and Vice Admiral Sir Timothy Laurence.
For the occasion, Princess Catherine and Prince William coordinated in elegant navy blue looks. Kate looked so lovely in a skirt suit composed of a pleated peplum blazer with a floral print in white and large buttons at the center. She paired the beautiful piece with a matching midi skirt, which featured the same print in reverse—white with navy florals—underneath.
More From Harper's BAZAAR

Kate further elevated the springtime ensemble with a blue suede hat that had a bow on the side, a matching suede clutch and gloves, and blue suede pointed-toe pumps.
She kept the monochrome going by wearing her sapphire-and-diamond engagement ring from William, as well as the late Princess Diana’s iconic sapphire-and-diamond earrings, which she has worn various times over the years. Her final accessory was Queen Alexandra's Three Feathers Brooch. The gorgeous piece, made up of diamonds, emeralds, and rubies, features the Prince of Wales feathers emblem.
Kate first wore the meaningful brooch at the first state visit of King Charles's reign in November 2022. Past Princesses of Wales, including Princess Diana and Queen Camilla, also wore it on special occasions. Diana often wore it as a pendant.
William coordinated with Kate in an all-blue look. It was made up of an elegant navy suit, a crisp white shirt, a cornflower blue tie, and shiny black dress shoes.
Photos show the pair standing directly behind King Charles and Queen Camilla at the Commonwealth Day Service. The monarch wore a gray pinstriped suit, a white shirt, a silver printed tie, and black dress shoes. Camilla, meanwhile, wore a bright cobalt blue coat dress, a matching hat with feathers, black sheer tights, black pumps, and a matching clutch.
Rosa Sanchez is the senior news editor at Harper's Bazaar, working on news as it relates to entertainment, fashion, and culture. Previously, she was a news editor at ABC News and, prior to that, a managing editor of celebrity news at American Media. She has also written features for Rolling Stone, Teen Vogue, Forbes, and The Hollywood Reporter, among other outlets.