Marie Charlotte Cäcilie Geistinger (1836–1903) was an Austrian actress and operatic soprano, known as the "Queen of Operetta". She frequently appeared in works by Jacques Offenbach, Johann Strauss II and Franz von Suppé. She achieved particular acclaim for performing Rosalinda in the première of Die Fledermaus at the Theater an der Wien in 1874. In 1881, her debut at the Thalia Theatre in New York was well received.

Die Fledermaus is an operetta composed by Johann Strauss II to a German libretto by Karl Haffner and Richard Genée, which premiered in 1874.