Though Russian Vine is not a musical, music is nonetheless an important aspect of the film. The main character, Rebecca, sings a lullaby at various points during the story. In the film's climax, this song conveys vital information about Rebecca's state of mind.

The lullaby for Russian Vine is composed by the director's wife, Karin Weekly, who has studied classical piano and composition. You may listen to a rough recording of Karin singing an early test of the theme here (in AIFF format) or here (in MP3 format). You may also view sheet music for the theme here.