What American composer wrote both "Rhapsody in Blue" and "An American in Paris"
Gershwin (disambiguation) George Gershwin (1898–1937), American composer, author of famous works such as "Rhapsody in Blue" and "An American in Paris"
Roy Douglas Richard Roy Douglas (12 December 1907 – 23 March 2015), better known as Roy Douglas, was a British composer, pianist and arranger. He worked as musical assistant to Ralph Vaughan Williams, William Walton, and Richard Addinsell, made well-known orchestrations of works such as "Les Sylphides" (based on piano pieces by Chopin) and Addinsell's "Warsaw Concerto", and wrote a quantity of original music.