Mariusz Kwiecień is a Polish artistic director and retired operatic baritone who sang leading roles in the major opera houses of Europe and North America. He received particular distinction in the title role of Mozart's Don Giovanni, which he sang at the Metropolitan Opera, Lyric Opera of Chicago, Vienna State Opera, Bilbao Opera, Houston Grand Opera, San Francisco Opera, Santa Fe Opera, Warsaw Opera, Royal Opera House, London, and Seattle Opera, where he won the company's 2006-07 Artist of the Year award for the role.