The Duchess showed off her stylish wardrobe in the dark green coat which had a zip fastened up to the top.
The design had two pockets on the front and pulled in at the waist before continuing into a full skirt.
She arrived wearing the long coat, believed to be by McQueen, with similar designs on sale for £1077.
The garment had a thin band around the waist and gold buttons at the wrist.
source: express.co.uk