 | Russell Crowe als Father Gabriele Amorth |
 | Daniel Zovatto als Father Esquibel |
 | Alex Essoe als Julia |
 | Franco Nero als The Pope |
 | Peter DeSouza-Feighoney als Henry |
 | Laurel Marsden als Amy |
 | Cornell John als Bishop Lumumba |
 | Ryan O'Grady als Cardinal Sullivan |
 | Bianca Bardoe als Rosaria |
 | Santi Bayón als Roberto Vasquez IV (Henry's Dad) |
 | Paloma Bloyd als Interpreter |
 | Alessandro Gruttadauria als Father Gianni |
 | River Hawkins als Enzo / Halphas |
 | Jordi Collet als Carlos |
 | Carrie Munro als Adella |
 | Marc Velasco als Worker 1 |
 | Edward Harper-Jones als Young Amorth |
 | Matthew Sim als Cardinal Abato |
 | Victor Solé als Spanish Doctor |
 | Tom Bonington als Vatican Doctor |
 | Andrea Dugoni als Drunken Farmer |
 | Ed White als Nazi Soldier |
 | Laila Barwick als Daughter (Farmhouse) |
 | Gennaro Diana als Italian Priest |
 | Pablo Raybould als Bishop Barbuto |
 | Ralph Ineson als Asmodeus (voice) |
 | Derek Carroll als Doctor |
 | Ella Cannon als Partisan |
| Julius Avery | Director |
| Evan Spiliotopoulos | Screenplay |
| Doug Belgrad | Producer |
| Michael Patrick Kaczmarek | Producer |
| Jeff Katz | Producer |
| Eddie Siebert | Producer |
| Michael Petroni | Screenplay |
| Michael Petroni | Screenstory |
| R. Dean McCreary | Screenstory |
| Chester Hastings | Screenstory |
| Gabriele Amorth | Book |
| Sophie Cassidy | Executive Producer |
| Jo Homewood | Executive Producer |
| Eddie Siebert | Executive Producer |
| Khalid Mohtaseb | Director of Photography |
| Matt Evans | Editor |
| Amy Dolan | Casting |
| Dan Hubbard | Casting |
| Anne McCarthy | Casting |
| Alan Gilmore | Production Design |
| Gary McGinty | Art Direction |
| Claire Levinson-Gendler | Set Decoration |
| Lorna Marie Mugan | Costume Design |
| Orla Carrol | Hair Designer |
| Lynn Johnson | Makeup Designer |
| Sophie Flynn | Prosthetics |
| Aisling Nairn | Prosthetic Makeup Artist |
| Viktoria Stieber | Prosthetic Makeup Artist |
| Tristan Versluis | Prosthetics |
| Ailish Bracken | Production Manager |
| Julia McCarthy | Key Production Assistant |
| Ian Adams | Third Assistant Director |
| Dee Doyle | Assistant Director Trainee |
| Alan Elbakidze | Assistant Director Trainee |
| Sarah Harte | Second Assistant Director |
| Robert Kiernan | Third Assistant Director |
| James McGrady | First Assistant Director |
| Rachel Morgan | Crowd Assistant Director |
| Rachel Wren | Assistant Director Trainee |
| Gary Cagney | Art Department Coordinator |
| Graeme Callander | Storyboard Artist |
| Daniel Carrasco | Creature Design |
| Joanne Carstairs | Props |
| Ben Crimmins | Carpenter |
| Darren Crimmins | Construction Manager |
| Dave Flynn | Sculptor |
| Mark Forbes | Scenic Artist |
| Erin Hermosa | Assistant Art Director |
| Taine King | Standby Art Director |
| Gary Middlewick | Assistant Set Decoration |
| Anaïs Mulgrew | Graphic Designer |
| Melissa Mulligan | Sculptor |
| Curnan O'Connell | Assistant Art Director |
| Lizzie Osborne | Assistant Art Director |
| Ken Perkins | Storyboard Artist |
| Mary Pike | Set Designer |
| Isabella Walsh | Sculptor |
| Ivan Aleksandrov | Sound Assistant |
| Amy Barber | Foley Editor |
| Amy Barber | Foley Mixer |
| Guillaume Beauron | Sound Assistant |
| Vasyl Gudz | Sound Mixer |
| James Hyde | ADR Mixer |
| Oscar Pescott | Boom Operator |
| Robert Stambler | Supervising Sound Editor |
| Ryan A. Sullivan | Sound Effects Editor |
| Simon J. Willis | Sound Mixer |
| Matt Yocum | Sound Designer |
| Paul Byrne | Special Effects Supervisor |
| Marcos Sagasta | Special Effects Makeup Artist |
| Rolf te Booij | Animatronics Supervisor |
| Vincent Mensink | Animatronics Designer |
| Greg Strasz | Visual Effects Supervisor |
| Aoife Bailey | Stunt Double |
| Hannah Behan | Stunt Double |
| JJ Battell | Stunts |
| Aoife Byrne | Stunt Driver |
| Seth Collins | Stunts |
| Brendan Condren | Stunt Coordinator |
| Fionn Condren | Stunts |
| David Flynn | Stunt Double |
| Jessica Grant | Fight Choreographer |
| Vladislav Jacukevič | Stunts |
| Isaac Kearns | Stunts |
| Norman Kelly | Stunts |
| Martin Kenny | Stunts |
| Damian Lynch | Stunt Double |
| Yeray Morillas | Stunts |
| Giedrius Nagys | Stunt Coordinator |
| Jokubas Nagys | Stunt Double |
| Michelle O'Loughlin | Stunt Double |
| Donal O'Shea | Stunts |
| Alessandro Romeo | Stunts |
| Lara Serviolle | Stunts |
| Martin White | Stunts |
| Daniel Bolaños Meade | Second Assistant "C" Camera |
| Gemma Bovenizer | Video Assist Operator |
| Jonny Burnside | Digital Imaging Technician |
| Barry Conroy | Gaffer |
| Sean Conroy | Lighting Technician |
| Richie Egan | Dolly Grip |
| Evan Fanning | Second Assistant "A" Camera |
| Cel Bothwell-Fitzpatrick | Digital Imaging Technician |
| Charlie Fleetwood | First Assistant "C" Camera |
| Mark Hannon | Assistant Camera |
| Graeme Haughton | Best Boy Lighting Technician |
| Ben Ingoldsby | Camera Trainee |
| Simon Keenan | Digital Imaging Technician |
| Colin John Kelly | Rigging Gaffer |
| Greg Kozma | Camera Trainee |
| John McCarthy | First Assistant "B" Camera |
| Philip Murphy | Key Grip |
| Gerard O'Keeffe | Second Assistant "B" Camera |
| Jonathan Ozan | Digital Imaging Technician |
| Jason Ruffley | Best Boy Grip |
| Simon Higgins | Casting Assistant |
| Damiano Di Giacomo | Costume Assistant |
| Giampaolo Grassi | Costumer |
| Cáitlín Keenan | Costume Coordinator |
| Rhona McGuirke | Costume Supervisor |
| Alejandra McNamara | Costume Assistant |
| Ciara O'Toole | Assistant Costume Designer |
| Phoenix Chisholm | First Assistant Editor |
| Jackie Jarvis | First Assistant Editor |
| Fergus Rotherham | Colorist |
| Jack Farrelly | Assistant Location Manager |
| Evelyn O’Neill | Assistant Location Manager |
| Robert Ames | Conductor |
| Tim Ryan | Music Editor |
| Silvia Bellitto | Script Supervisor |
| Jed Kurzel | Music |
| The Cult | Music |
| Emma Moffat | Makeup Artist |
| Til Frohlich | Art Direction |
