Julianna Di Giacomo is an American operatic soprano who has had an active international singing career since 1999. She has performed leading roles with several major opera houses, including La Scala in Milan, the Metropolitan Opera in New York City, the Opéra-Comique in Paris, and the Teatro Real in Madrid. On the concert stage she has appeared with several notable orchestras, including the Gothenburg Symphony Orchestra, the Los Angeles Philharmonic, the New York Philharmonic, the Opera Orchestra of New York, and the Vienna Philharmonic.