Sophie, the Duchess of Edinburgh is marking a milestone birthday! She turned 60 on 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.

Sophie, Duchess of Edinburgh released a trio of stunning portraits to commemorate her 60th birthday that seemingly included a subtle sartorial nod to her grand new title. See the photos, here.

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

A photograph of the Duchess of Edinburgh smiling has been released by Buckingham Palace to celebrate her upcoming 60th birthday. The photo of Sophie mid-laugh perched on a window seat at her home in Bagshot Park was captured by the London-based photographer Christina Ebenezer earlier this month.

The Duchess of Edinburgh is marking her 60th birthday privately at home with the Duke of Edinburgh, and a new photograph has been released to mark the milestone

The duchess is set to celebrate the milestone at home with the Duke of Edinburgh on Monday at her Bagshot Park home.

Ahead of Duchess Sophie's 60th birthday this month, Buckingham Palace have released a new series of stunning photos of her - and as well as her beautiful outfits, there was one other thing that stood out to royal fans.

A new portrait of the Duchess of Edinburgh has been released to celebrate her 60th birthday. In the picture, taken by London-based fashion photographer Christina Ebenezer earlier this month, Sophie looks relaxed and happy as she perches in a window seat at her Surrey home.

Photographer Christina Ebenezer took the picture of the Duchess of Edinburgh, and perfectly captures the senior royal's effortless charm.