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.

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

Kate Middleton often pays homage sartorially to her late mother-in-law Princess Diana, including at today’s Commonwealth Day service.

The Princess of Wales honored her father-in-law, King Charles, in the traditional way and made a subtle homage to Queen Elizabeth during Monday’s church service.

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.