Lucy, Lady Duff-Gordon, English fashion designer (d. 1935)
Lucy Christiana, Lady Duff-Gordon (née Sutherland; 13 June 1863 – 20 April 1935) was a leading British fashion designer in the late 19th and early 20th centuries who worked under the professional name Lucile.

The first British-based designer to achieve international acclaim, Lucy Duff-Gordon was a widely acknowledged innovator in couture styles as well as in fashion industry public relations. In addition to originating the "mannequin parade", a precursor to the modern fashion show, and training the first professional models, she launched slit skirts and low necklines, popularized less restrictive corsets, and promoted alluring and pared-down lingerie.Opening branches of her London house, Lucile Ltd, in Chicago, New York City, and Paris, her business became the first global couture brand, dressing a trend-setting clientele of royalty, nobility, and stage and film personalities. Duff-Gordon is also remembered as a survivor of the sinking of the RMS Titanic in 1912, and as the losing party in the precedent-setting 1917 contract law case of Wood v. Lucy, Lady Duff-Gordon, in which Judge Benjamin N. Cardozo wrote the opinion for New York's highest court, the New York Court of Appeals, upholding a contract between Duff-Gordon and her advertising agent that assigned the agent the sole right to market her name. It was the first case of its kind, clothes labelled and sold at a lowered cost in a cheaper market under an expensive "brand name".