Duchess of Cambridge stuns in $10,000-plus lace dress at British art gala

She sported a sleeved lace frock by London-based designer Temperley to a fundraising gala at the National Portrait Gallery in London.

She teamed the floor-length gown with a pair of $14,000 ruby and citrine earrings by Kiki McDonough, along with a gold Wilbur & Gussie clutch and metallic Jimmy Choo heels.

The designer outfit — which had a collective price-tag of about $30,000 — was a far cry from the Duchess’s tendency to wear more affordable high street brands like Whistles and Reiss.

The Duchess of Cambridge, pictured with gallery director Nicholas Cullinan, at the National Portrait Gallery in London. Picture: AFPSource:AFP

She teamed the Temperley dress with a gold clutch by Wilbur & Gussie. Picture: AFPSource:AFP

Kate flew solo without her husband, Prince William, for the exclusive party also attended by British ‘it’ girl Alexa Chung and model and presenter Donna Air, who is dating Kate’s younger brother James Middleton.

Gone Girl star Rosamund Pike and Arizona Muse were also at the gala.

Spotty. Alexa Chung at the National Portrait Gallery’s gala in London. Picture: Getty ImagesSource:Getty Images

Chung, 33, wore a polka dot off-the-shoulder gown by Spanish label Loewe.

She took her father, Philip, as her date in lieu of her boyfriend, Big Little Lies hunk Alexander Skarsgard.

The couple are rarely pictured together in public despite having dated for nearly two years.

New York-based Chung — a model, writer, designer and former MTV presenter — is set to launch her own self-titled “contemporary-priced” line, Alexachung, in May.

When the Duchess of Cambridge met Alexa Chung. Picture: APSource:AP

Kate, pictured with artist Gillian Wearing, at the gala. Picture: APSource:AP