The Princess of Wales joined members of the royal family at Westminster Abbey on Monday, March 10, to celebrate Commonwealth Day. As part of the service, Kate and Prince William processed behind King Charles and Queen Camilla. They were followed by Anne, Princess Royal, as well as the Duke and Duchess of Gloucester.

The Princess of Wales wore a bright red bow-trimmed dress, pillbox hat and some meaningful jewelry for the annual celebration.

Middleton — who scaled her royal schedule back last year due to her cancer diagnosis — joined Prince William, King Charles, Queen Camilla, Princess Anne, Prince Richard, Duke of Gloucester and Birgitte, the Duchess of Gloucester, for the commemoration.

Kate Middleton paid a subtle tribute to Princess Diana and Queen Elizabeth II with her fashion as she attended the Commonwealth Day celebrations in London March 10.

At the time, Kensington Palace stated that Princess Kate was not expected to return to public duties "until after Easter," which fell on March 30. However, on March 22, she appeared in a video message, sharing that she had been undergoing chemotherapy for an undisclosed form of cancer following post-operative testing.

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.

It’s not the first time Kate, 43, has worn the Beau Tie dress for major occasions. She wore the same dress for the Together at Christmas carol service in December 2022, and again in November 2023 for the South Korean’s president state visit.