Stefano de Peppo was born in Italy and started his stage experience as a boy soprano at La Scala in Milan. He is known for his powerful voice, impeccable diction and stage skills as a leading basso buffo in such roles as Leporello (don Giovanni), Bartolo (Barbiere di Siviglia), don Magnifico (La Cenerentola), Dulcamara (L’Elisir d’amore), Mustafà (L’Italiana in Algeri), don Pasquale, Gianni Schicchi, Sulpice (La Fille du Regiment), The Sacristan (Tosca).

He performed with opera houses in: Atlanta, San Diego, Minnesota, Arizona, Sarasota, Palm Beach, Memphis, Montana, Portland, Austin, throughout Spain and Mexico, Rome, Bogotà, Essen, Versailles, Massy,London (Royal Albert Hall and Holland Park), Prague, Finland, San Jose, Costa Rica, Tel Aviv, and  New York (Carnegie Hall).