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

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

Sophie looks happy and relaxed in the Palace-released image, captured by London-based portrait, fashion and commercial photographer Christina Ebenezer at Bagshot Park this month

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.

The Duchess of Edinburgh has a big birthday on Monday. It is best not to mention the number too loudly. “I’m 21!” she protests, laughing, before being reminded that it is he

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