Baroness Emma Magdolna Rozália Mária Jozefa Borbála "Emmuska" Orczy de Orci (September 27, 1865 – November 12, 1947) was a Hungarian-born British novelist and playwright. She is best known for her series of novels featuring the Scarlet Pimpernel, the alter ego of Sir Percy Blakeney, a wealthy English fop who turns into a quick-thinking escape artist in order to save ill-fated French royalty from "Madame Guillotine" during the French revolution, establishing the "hero with a secret identity" into popular culture.
Opening in London's West End on 5 January 1905, The Scarlet Pimpernel became a favourite of British audiences. Some of Orczy's paintings were exhibited at the Royal Academy in London. During World War I, she formed the Women of England's Active Service League, an unofficial organisation aimed at encouraging women to persuade men to volunteer for active service in the armed forces.