The Order of the Garter is the oldest and most senior orders of chivalry in Britain, with knights chosen in recognition of their public service. The ceremony is part of a busy period for the royals. The King and Queen are expected at Royal Ascot in the coming days.

Kate Middleton joined members of the royal family at the Order of the Garter service, curtsying to King Charles and Queen Camilla in a sweet moment on the steps of St. George's Chapel in Windsor Castle.

The Princess of Wales was seen in Windsor as she attended the ancient Order of the Garter Day service at Windsor Castle.

Princess Kate and Duchess Sophie stepped out for a joint Royal Family appearance for the Order of the Garter procession on June 16.

Kate Middleton recreated a look she first styled in May for The Order of the Garter Service in Windsor on Monday. The event was held only two days after Trooping the Colour, which the Princess of Wales attended alongside members of the British royal family.

Princess Kate and the Duchess of Edinburgh stepped out at Windsor Castle this afternoon for a major royal event. Kate, 43, and Sophie, 60, attended the Order of the Garter service - one of the most traditional Royal Family events in the calendar.

The Princess of Wales and the Duchess of Edinburgh are said to be like ‘sisters’, and this friendship took centre stage as the royals celebrated Garter Day at Windsor Castle

The Princess of Wales has a stunning family home in Windsor, Adelaide Cottage – and is this a major hint about how she's decorated it?