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.

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

Kate Middleton stepped out for the Order of the Garter service on Monday, matching her monochromatic look to her trusty Strathberry Multrees Chain Walle t. The luxe leather purse has become one of her favorites over the years — so much so that she owns it in at least three colors.

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?