Listen to Main Theme from Once Upon a Time in the West online. Main Theme from Once Upon a Time in the West is an English language song and is sung by Ennio Morricone. Main Theme from Once Upon a Time in the West, from the album Las Mejores Orquestas del Mundo Ennio Morricone, was released in the year 2014. The duration of the song is 3:20. Download English songs online from JioSaavn.