 She appeared mostly in soubrette roles, but is known for performing as Marzelline at the premiere of Beethoven's "Fidelio" on 20 November 1805.Born in Frankfurt am Main, Müller was the daughter of the famous actress Ludovica Müller "née" Spieß (1763–1837).She made her debut on 10 July 1798 at the Vienna Theater am Kärntnertor as "Bärbchen" (Barbarina) in the German-language premiere of Mozart's opera "Le nozze di Figaro".