Arlen, Harold (1905-1986), was an American composer who wrote hundreds of popular songs. Arlen wrote music for both Broadway shows and motion pictures. He won an Academy Award for his song "Over the Rainbow" from the classic American movie musical The Wizard of Oz (1939). He also composed the film's other songs. Arlen worked with several of the leading lyric writers in popular music history, including Johnny Mercer, Ted Koehler, E. Y. Harburg, and Ira Gershwin.

