Marguerite Piazza (May 6, 1920 – August 2, 2012) was an American soprano, entertainer and philanthropist from New Orleans, Louisiana.
Marguerite Clair Lucille Luft was born in 1920 to Albert William Luft, Jr. (c. 1897–September 12, 1923) and Margherita (née Piazza; c. 1900–1958, later known as Margaret), who wed on January 24, 1917. Around 1927, the widowed Margaret Luft wed Reuben Davis Breland, whose surname Marguerite adopted. Marguerite was the first Queen of the Krewe of Virgilians during Mardi Gras in her native New Orleans. A 1940 graduate of Loyola University of the South's College of Music, she went on to study at Louisiana State University, where she was a student of the baritone Pasquale Amato. She adopted her mother's maiden name (Piazza) professionally.
In 1944, she joined the New York City Opera, and was the youngest member of the company. Her first role was Nedda in Pagliacci, and in subsequent seasons appeared in La bohème (as Musetta), Der Zigeunerbaron, Don Giovanni (as Donna Elvira, in Theodore Komisarjevsky's production), and Amelia al ballo (as Amelia). She made her first appearance with the New Orleans Opera Association in Martha (in 1945), followed by Hänsel und Gretel (as Gretel), as well as the title role in Il segreto di Susanna. In 1950, Piazza made her Broadway debut, in Happy as Larry, with Burgess Meredith directing and starring in the title rôle, and Alexander Calder designing.