The original music score for Urban Ghost Story was written by Rupert Gregson Williams. It was essential that the music reflect the complex emotions within the story, weaving a musical tapestry that hinted upon solitude, guilt, innocence, and above all, to reflect these emotions in a contemporary and spiritual style.

This was acheieved in two main ways. Lizzie's theme is almost always played on a piano, accompanied by flute or solo female vocal. This helped internalise the thought processes Lizzie feels during the film, ultimately reflecting her solitude.