The Devil's Harmony Revenge is best served a cappella. A bullied teenage girl leads a glee club on a trail of destruction against her high school enemies. Details Casts Videos Galleries Posters Title The Devil's Harmony Release Date 2019-10-30 Runtime 00 Hours 14 Minutes Genres Horror Comedy Music Production Companies Tatata Studios, Toma Productions, Salaud Morisset Production Countries United Kingdom Patsy Ferran... Kiera... Leo Suter... Connor... Guy Henry... Headmaster Plugg... Bobby Schofield... Doug... Cassian Bilton... Kornitzer... Ramzan Miah... Lawrence... Matthew James Morrison... Philips... Kieran Slade... Michael... Kit Young... Tyrone... TRAILER: The Devil's Harmony (2019 short film) (Trailer) Original Size (1325x745) Original Size (1315x740) Original Size (1600x900) Original Size (1600x900) Original Size (1600x900) Original Size (1600x900) Original Size (1920x1080) Original Size (1920x1080) Original Size (1600x2400) Original Size (960x1440) Original Size (1600x2385) Original Size (2000x3000) Original Size (1677x2516) Original Size (2000x2818)