The Chieftain is a two-act comic opera by Arthur Sullivan and F. C. Burnand based on their 1867 opera, The Contrabandista. It consists of substantially the same first act as the 1867 work with a completely new second act. It premiered at the Savoy Theatre on 12 December 1894, under the management of Richard D'Oyly Carte, for a run of 97 performances.

Margaret Florence Greig, known by her stage name Florence St. John, was an English singer and actress of the late Victorian and Edwardian eras famous for her roles in operetta, musical burlesque, music hall, opera and, later, comic plays.