Frank (2014) – IMDb

Jon, a young wanna-be musician, discovers he’s bitten off more than he can chew when he joins an eccentric pop band led by the mysterious and enigmatic Frank. Director Lenny Abrahamson Writers Jon Ronson (newspaper article) Peter Straughan Stars Michael Fassbender Domhnall Gleeson Maggie Gyllenhaal See production, box office & company info

https://www.imdb.com/title/tt1605717/