Mildred Miller Posvar, known professionally as Mildred Miller, was a renowned American classical mezzo-soprano whose illustrious career spanned over two decades. Born in the mid-twentieth century, Miller captivated audiences with her powerful performances in operas, concerts, and recitals. She was a principal artist at the prestigious Metropolitan Opera from 1951 to 1974, where she notably portrayed the role of Cherubino in Mozart's "The Marriage of Figaro" a remarkable 61 times. Her repertoire included iconic roles such as Preziosilla in "La Forza del Destino," showcasing her versatility and depth as a performer. Beyond her stage presence, Miller also made significant contributions to the opera world by founding the Opera Theater of Pittsburgh in 1978, serving as its Artistic Director until 1999. Her legacy endures through her recordings, including collaborations with esteemed conductors like Bruno Walter, and her impact on the opera community is immeasurable.