The royal family Instagram account is getting ahead of the festivities and just shared Duchess Sophie's portrait before her birthday on Monday. However, there's one tiny detail that I almost missed—and it has nothing to do with her photos.

Kate Middleton will be joining Prince William, King Charles, Queen Camilla, and other royals at a black-tie dinner-dance celebration for Sophie, Duchess of Edinburgh's 60th birthday, a source tells 'The Sun.

Duchess Sophie marked her 60th birthday on Monday, Jan. 20, and along with some gorgeous new photos released for the occasion, Prince Edward's wife is allegedly planning a special black-tie party with the Princess of Wales and other royal guests.

London-based fashion photographer Christina Ebenezer created Duchess Sophie's beautiful new portrait. Sharing the photographs on Instagram, the Royal Family's official account revealed, " The Duchess of Edinburgh was interested in Ebenezer's creative style of photography and wanted to support a rising female photographer."

The royal family has wished the Duchess of Edinburgh a very happy 60th birthday. Sophie’s milestone was celebrated on the British monarchy’s official social media accounts with a video montage of photographs of the duchess on royal engagements,

Sophie, the Duchess of Edinburgh is turning 60 in style. The royal—who marked her milestone birthday on Monday, January 20—released a trio of stunning portraits to commemorate the special occasion over the weekend that seemingly included a subtle sartorial nod to her grand new title.