Final Fantasy: The Spirits Within - Original Motion Picture Soundtrack Catalog # Composers Arrangers Producers Publisher CD Info Length Release date Final Fantasy: The Spirits Within is the complete soundtrack for the major motion picture, Final Fantasy: The Spirits Within. It was performed by the London Symphony Orchestra. The song "Spirit Dreams Inside" was written by Hyde and performed by L'Arc-en-Ciel, while the song "The Dream Within" was written by Elliot Goldenthal and preformed by Lara Fabian.