Catherine, Princess of Wales, joined Britain’s King Charles III and other members of the royal family in celebrating Commonwealth Day on Monday, attending an event at London’s Westminster Abbey filled with performances from countries across the association.

The Princess of Wales returned to the Family of Nations when she joined the King and Queen in celebrating Commonwealth Day. Kate missed the Westminster Abbey service last year, as did Charles, with both receiving treatment for cancer during a troubling health scare period for the monarchy.

Kate Middleton attended the Commonwealth Day Service, marking her first appearance at the event in two years after undergoing cancer treatment. Dressed in a red Catherine Walker dress, her presence signified her return to full royal duties following her remission announcement in January.