"The movie's soundtrack consists of Rupert Gregson-Williams' score, as well as the original song "To Be Human," an anthemic pop ballad written by Florence Welch and Rick Nowels and sung by Sia and Labrinth. Gregson-Williams' music is the centerpiece, though, not only due to the score's over-70-minute playing time, but for a sustained intensity that balances its somber and rousing tones".