Taking to the red carpet for the world premiere of ‘A Street Cat Named Bob’ in London on Thursday 3 November, the Duchess stunned in an ivory dress by Self Portrait.
The dress features a crochet lace top with daisy neck detail and a long pleated skirt with a thigh-high slit.
Paris Hilton wore the same design when she attended an amfAR gala in Los Angeles on 27 October.
Self Portrait was launched in 2013 by Central Saint Martins alumni Han Chong, and is one of the most celeb-loved brands around.
Beyoncé, Michelle Obama, Madonna and Maisie Williams have all been spotted in their signature lace-paneled dresses.