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.

Kate Middleton is set to attend the Commonwealth Day Service, a key event for the royal family. All about the Princess of Wales' RSVP next week.

Their Commonwealth Day appearance comes five years after Prince Harry and Meghan Markle's final outing as working royals at the same service — a seismic moment in royal history.