The daughter of Isabelle-Blanche Singer (the heiress of the sewing-machine pioneer) and the Duc Decazes, Marguerite Decazes was raised by her aunt the Princess Edmond de Polignac who initiated her to arts and music, following her mother's suicide. After her first husband's death, the Prince de Broglie, she married, in 1919 Reginald Fellowes, one of Winston Churchill's cousin. An acclaimed beauty and society figure, Daisy Fellows was also the leader of what was called 'les dames de Vogue' in the 1920s which established her as a timeless fashion icon – 'the most elegant and most talked about woman in Paris' who dared to wear Elsa Schiaparelli's surrealist designs and Gabrielle Chanel's total black outfits. Daisy Fellowes took great pleasure in making her counterparts seem frivolously overdressed: at the races, she appeared hatless amid a raft of flounces and bows, she hosted dinners in leopard-print pyjamas while others wore flowery tea gowns. Women feared her as much as admired her: she was a voracious man-eater and terribly cruel. In 1933, she was appointed as the French Harper's Bazaar editor in chief: a job she quit two years later because she found it boring. As a trendsetter from the Roaring Twenties on through the café-society 1930s, Daisy Fellowes 'launched more fashions than any other woman in the world' according to Jean Cocteau.