Sophie, the Duchess of Edinburgh is marking a milestone birthday! She turned 60 on Monday, Jan. 20, and friends and former colleagues have been honoring her contribution to the royal family – amid the release of the duchess' stunning new portrait.

It’s a milestone birthday for Duchess Sophie, who officially rang in the special day on January 20 with a little more pomp and circumstance than usual, courtesy of an official new portrait and plans for a major birthday celebration at their Berkshire home Bagshot Park.

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

The Duchess of Edinburgh has celebrated her 60th birthday and the Royal Family marked a milestone in the life of one of their MVPs. When Sophie Rhys-Jones married the third son of Queen Elizabeth

I love how she is not afraid to try new things and she makes beautiful choices,” designer Suzannah Crabb of royal favorite Suzannah London tells PEOPLE

Duchess Sophie has entered a new decade, and she's ready to face it in style. The Duchess of Edinburgh—who turned 60 on Monday, Jan. 20—has certainly tweaked her wardrobe over the years, and multiple designers recently spoke to People about the royal's evolving sense of fashion.

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.