“Autumn Leaves” is a popular song. Originally it was a 1945 French song, “Les Feuilles mortes” (literally “The Dead Leaves”), with music by Hungarian-French composer Joseph Kosma and lyrics by poet Jacques Prévert. The Hungarian title is “Hulló levelek” (Falling Leaves). Yves Montand (with Irène Joachim) introduced “Les feuilles mortes” in the film Les Portes de la nuit (1946).
The song is in AABC form. “Autumn Leaves” offers a popular way for beginning jazz musicians to become acquainted with jazz harmony as the chord progression consists almost solely of ii-V-I and ii-V sequences which are typical of jazz. It was originally, and is most commonly, performed in the key of G minor, but is also played in E minor and other keys. Eva Cassidy’s version (clip on the right) is played in B-flat minor. (source: Wikipedia)