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

The Duchess of Edinburgh married into the Royal Family in 1999 and has been a much-loved family member ever since.

Duchess Sophie has seemingly suffered a blow amid her 60th birthday celebrations.The Duchess of Edinburgh, who has always been among one of the hardest working royals, is not going to receive any promotion anytime soon,

New photo of Duchess of Edinburgh as she marks 60th birthday - The duchess is set to celebrate the milestone at home with the Duke of Edinburgh on Monday at her Bagshot Park home.

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.