As one of the most senior members of the royal family, the clothes Catherine, Princess of Wales, wears in public often fulfil a diplomatic purpose. Consider the maple-leaf brooch she wore during her tour of Canada in 2011, the sky-blue jumper chosen in support of Ukraine in 2022, or, more recently, the blush-pink Dior Bar jacket she selected to greet President Emmanuel Macron and Brigitte Macron at the start of their state visit in 2025—small sartorial details deployed as symbols of respect.

That same approach extends to familial engagements too, where dressing as a united front projects not only solidarity and confidence in the institution, but also the more relatable bonds of domestic life. Which might explain why the princess coordinated with all three of her children—Prince George, Princess Charlotte, and Prince Louis—for Trooping the Colour this weekend, the annual ceremony held on Horse Guards Parade to mark the sovereign’s official birthday. It was an image of soft diplomacy, telegraphing stability within the family at a glance.

Scroll through the gallery below to see the most memorable times the Princess of Wales has embraced coordinated family dressing.