
Kate Middleton dazzled onlookers at a dinner for London's National Portrait Gallery with a diamond necklace borrowed from the queen. (AP)
The Duchess of Cambridge was wearing a midnight blue Jenny Packham dress but it was the Cartier diamond known as the 'Nizam of Hyderabad', given to Queen Elizabeth II in 1947 for her wedding to the Duke of Edinburgh, that had tongues wagging. (AP)
Kate Middleton is escorted by National Portrait Gallery's Director Sandy Nairne as they stand opposite a portrait of the Duchess during the Portrait Gala 2014. (Reuters)
Duchess Kate returned to her public duties with the black tie fundraising dinner. (AP)
Officially known as the Duchess of Cambridge, the former Kate Middleton gave a short speech before guests including movie star Elizabeth Hurley and rocker Bryan Adams. (AP)
Kate has been taking it easy on the social calendar since the birth of her son, Prince George, last year. (AP)