Ivan Semyonovich Kozlovsky (Russian: Ива́н Семё́нович Козло́вский, Ukrainian: Іван Семенович Козловський; also referred to as Kozlovskiy or Kozlovskij; March 24 [O.S. March 11] 1900 – December 21, 1993) was a Soviet lyric tenor and one of the greatest stars of Soviet opera, as well a producer and director of his own opera company, and longtime teacher at the Moscow Conservatory.