Igor Borisovitch Markevitch (Russian: Игорь Борисович Маркевич, Igor Borisovich Markevich, Ukrainian: Ігор Борисович Маркевич, Ihor Borysovych Markevych; July 27, 1912 – March 7, 1983) was a Ukrainian-born composer and conductor who studied and worked in Paris, naturalized Italian in 1947 and French in 1982. He was commissioned in 1929 for a piano concerto by impresario Serge Diaghilev of the Ballet Russe de Monte Carlo.