Kate Middleton and her husband Prince William were guests at the royal wedding of the summer, when Princess Anne’s son Peter Phillips married Harriet Sperling. The Princess of Wales dazzled in an heirloom three-strand pearl bracelet that previously belonged to Princess Diana.

"Everyone wants different things," the Princess of Wales said about her kids

All about Kate Middleton's parents, Carole and Michael Middleton, and her younger siblings, Pippa Middleton and James Middleton

For Tuesday’s meaningful occasion, Kate wore one of her favorite colors, red, and one of her preferred patterns, polka dots. But the look had surprising origins: it was designed by the fashion-world-favorite brand Rodarte.

"I know how hard it was for the children and my parents," the Princess of Wales told the partner of a patient

The princess stepped out in a gorgeous red polka-dot dress by Rodarte, Tattler reported. The outfit featured her favorite style of A-line skirt, a form-fitting waist, and retro-puffed sleeves. She paired the dress with Gianvito Rossi heels and a diamond and ruby necklace.

Peter Phillips marries Harriet Sperling in Gloucestershire as senior royals, including the King, attend.

Kate Middleton looked beautiful in a blush dress at the society wedding of the year today! The Princess of Wales wore the belted Roland Mouret tweed dress to the wedding of Queen Elizabeth II' s grandson Peter Phillips to nurse Harriet Sperling.