To attend this week's Order of the Garter ceremony, the 61-year-old royal stepped out in a magnificent natural straw Philip Treacy hat trimmed with ivory French lace and a fountain of feathers, which she donned for her nuptials at Windsor's Guildhall four years ago.
The royal also slipped on the LK Bennett beige suede shoes she wore for the civil ceremony too.
Camilla joined her husband Prince Charles and his son Prince William and other senior royals including the Queen and the Earl of Wessex at the annual ceremony held in St George's Chapel in the grounds of Windsor Castle. Decked out in the traditional blue velvet cape and a black ostrich plume-adorned hat, the Knights of the Garter made their way in a procession to the chapel following a lunch in the castle.
The Knight of the Garter - the most senior British order of chivalry - is traditionally given to those who have held public office, have contributed to national life or who have served the Queen personally.
Founded by Edward III in 1348, there are a maximum of 24 companion knights at any one time and their number is usually made up of senior politicians, members of the royal family and eminent public figures.
William - who last year was officially appointed the 1,000th Royal Knight of the Garter, watched by his proud girlfriend Kate Middleton - was given the day off from his training to become a RAF Search and Rescue helicopter pilot at RAF Shawbury for the event. He was due back in the cockpit on Tuesday.