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In page Margaret Campbell, Duchess of Argyll:

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On 21 February 1933, and after converting to his Roman Catholic faith,[1] Margaret married Charles Francis Sweeny (1910–1993) at the Brompton Oratory, London. Such had been the publicity surrounding her Norman Hartnell wedding dress, that the traffic in Knightsbridge was blocked for three hours.[2] For the rest of her life, she was associated with glamour and elegance, being a firm client of both Hartnell and Victor Stiebel in London before and after the war. She had three children with Charles Francis Sweeny: a daughter, who was stillborn at eight months in late 1933; another daughter, Frances Helen (born 1937, she married Charles Manners, 10th Duke of Rutland), and a son, Brian Charles (born 1940). The Sweenys divorced in 1947.[3]