Russell Crowe (Father Gabriele Amorth), Daniel Zovatto (Father Esquibel), Alex Essoe (Julia), Peter DeSouza-Feighoney (Henry), Ralph Ineson (Asmodeus (voice)), Laurel Marsden (Amy), Franco Nero (The Pope) more..., Ryan O'Grady (Cardinal Sullivan), Bianca Bardoe (Rosaria), Carrie Munro (Adella), Cornell John (Bishop Lumumba), Santi Bayón (Roberto Vasquez IV (Henry's Dad)), Paloma Bloyd (Interpreter), Alessandro Gruttadauria (Father Gianni), River Hawkins (Enzo / Halphas), Jordi Collet (Carlos), Marc Velasco (Worker 1), Edward Harper-Jones (Young Amorth), Matthew Sim (Cardinal Abato), Victor Solé (Spanish Doctor), Tom Bonington (Vatican Doctor), Andrea Dugoni (Drunken Farmer), Ed White (Nazi Soldier), Laila Barwick (Daughter (Farmhouse)), Gennaro Diana (Italian Priest), Pablo Raybould (Bishop Barbuto), Derek Carroll (Doctor (uncredited)), Ella Cannon (Partisan #2 (uncredited)), Amey De Souza (Villager (uncredited)), Neha Dubey (Young Nun (uncredited)), Niamh McHenry (Resistance Fighter (uncredited)), Ollie Ryan (Workman (uncredited)), Thomas Hopkins (Office Worker (uncredited))

Dan Hubbard (Casting), Anne McCarthy (Casting), Alan Gilmore (Production Design), Lorna Marie Mugan (Costume Design), Jeff Katz (Producer), Michael Petroni (Screenplay), Michael Petroni (Screenstory) more..., Evan Spiliotopoulos (Screenplay), Robert Stambler (Supervising Sound Editor), Jo Homewood (Executive Producer), Simon Higgins (Casting Assistant), Simon J. Willis (Sound Mixer), Brendan Condren (Stunt Coordinator), Tristan Versluis (Prosthetics), Orla Carrol (Hair Designer), Lynn Johnson (Makeup Designer), Mary Pike (Set Designer), Gary McGinty (Art Direction), Ailish Bracken (Production Manager), Greg Strasz (Visual Effects Supervisor), Julia McCarthy (Key Production Assistant), Aisling Nairn (Prosthetic Makeup Artist), Barry Conroy (Gaffer), Giedrius Nagys (Stunt Coordinator), Amy Barber (Foley Editor), Amy Barber (Foley Mixer), Graeme Callander (Storyboard Artist), Daniel Carrasco (Creature Design), Tim Ryan (Music Editor), Matt Evans (Editor), Guillaume Beauron (Sound Assistant), Paul Byrne (Special Effects Supervisor), Matt Yocum (Sound Designer), Mark Forbes (Scenic Artist), Rhona McGuirke (Costume Supervisor), Silvia Bellitto (Script Supervisor), Ivan Aleksandrov (Sound Assistant), Vincent Mensink (Animatronics Designer), Ian Adams (Third Assistant Director), Gabriele Amorth (Book) and others.