Sophie, Duchess of Edinburgh turns the milestone age of 60 on Jan. 20. Here, fashion insiders, including designers of some of the royal's favorite brands, reveal the secrets of her style evolution.

Sophie, the Duchess of Edinburgh is starring in a new portrait for her 60th birthday, and the photographer behind the camera is sharing an unseen snap from the photo session.

Congratulations are in order as Duchess Sophie gears up to celebrate her 60th birthday on Monday 20 January. In a slight deviation from tradition, the Royal Family has already marked the special day, taking to Instagram today to share a new photos showing the Duchess looking relaxed and happy ahead of the celebrations.

In a series of candid photographs by Christina Ebenezer, the Duchess of Edinburgh chose a wardrobe of re-wears that hint at her new era of royal life

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.

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.

Duchess Sophie turned 60 on Jan. 20, and the Royal Family released a new portrait in honor of the momentous occasion. London-based fashion photographer Christina Ebenezer created Duchess Sophie's beautiful new portrait.