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

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.

The picture was taken at Bagshot Park this month by photographer Christina Ebenezer, who was recommended by the duchess for her "creative style" of work.

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, set to upbeat music and featuring gold balloons.

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.

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

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.