Marcello Giordani (birth name Marcello Guagliardo; born 25 January 1963) is an Italian operatic tenor who has sung leading roles in opera houses throughout Europe and the United States. He has had a distinguished association with the New York Metropolitan Opera, where he has sung in over 200 performances since his debut there in 1993. (He is not to be confused with another Italian tenor, Massimo Giordano, who toured with Anna Netrebko in 2009.)