Along with The King and Queen Camilla, Prince William and Princess Kate, who share a close bond with the Edinburghs, are said to be joining the festivities. The Princess of Wales and Duchess of Edinburgh are said to have a particularly strong relationship, with Kate viewing Sophie as a sort of "royal sister."

As a source told VF, the Duchess of Edinburgh, a new family favorite, "prefers to keep the attention on her causes and charities rather than on herself."

The Duke of Edinburgh title had previously been held by the King and Prince Edward’s father Prince Philip for more than 70 years. While Prince Edward and Duchess Sophie are senior working royals, their two children Louise and James are unlikely to do the same, and currently do not use HRH titles.

With so many stylish royals in the world, it’s hard to believe there’s even more regal fashion for Us to obsess over. But alas, there is one British dignitary whose wardrobe we just cannot get enough of these days: Sophie,

Sophie, the Duchess of Edinburgh posed for a new portrait for her 60th birthday, and photographer Christina Ebenezer is sharing an unseen picture.

Kate Middleton found a mentor in Sophie, the Duchess of Edinburgh when she was first welcomed into the royal fold, but their warm working relationship has developed into an even closer sisterly bond amid Kate’s cancer battle.