Listen to Jill's Theme (From “Once Upon a Time in the West") online. Jill's Theme (From “Once Upon a Time in the West") is an English language song and is sung by The City Of Prague Philharmonic Orchestra. Jill's Theme (From “Once Upon a Time in the West"), from the album The Essential Ennio Morricone Film Music Collection, was released in the year 2016. The duration of the song is 6:04. Download English songs online from JioSaavn.