Princess Anne donned a black midi dress with a pleated skirt which featured a gold detail around the neck and pockets.
She combined the look with a chic black and gold clutch bag and black suede pumps.
For jewellery, the Princess Royal sported a pair of gold earrings, a pearl necklace with dark blue beads and gold spacer elements, and a diamond brooch.
The royal has donned this unique necklace before, such as at the Royal London Yacht Club Champagne Party during Cowes Week in August 2018.
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