It was a Trooping the Colour to remember over the weekend as King Charles marked his official birthday celebration on Saturday—a long-standing tradition where the British monarch publicly acknowledges their birthday in June versus the actual day in order to take advantage of better weather.

Kate Middleton turned heads with her outfit choice for Trooping the Color on June 14. The Princess of Wales looked chic in a stunning sky-blue coat dress by her favorite designer, Catherine Walker. Her ensemble brought back memories of the 1988 Trooping the Color,

Kate Middleton and royal family unite at King Charles III's birthday parade, with the Princess of Wales wearing an ensemble reminiscent of late mother-in-law Princess Diana.