“An American in Paris” was composed for orchestra by George Gershwin who was a jazz songwriter in 1928.
He composed many many jazz tunes have become standard numbers now, the most of lyrics were in charge of his elder brother Ira Gershwin.
He had started his career as a songwriter since 1916, but he passed away in 1937 at the age of 38.
He own learned composing classical music by him self, composed some classical tunes, the opuses have become popular ones, various musicians performed them now.

