 | Taissa Farmiga als Sister Irene |
 | Jonas Bloquet als Maurice Theriault |
 | Storm Reid als Sister Debra |
 | Anna Popplewell als Kate |
 | Bonnie Aarons als The Demon Nun / Valak |
 | Katelyn Rose Downey als Sophie |
 | Suzanne Bertish als Madame Laurent |
 | Léontine d'Oncieu als Simone |
 | Anouk Darwin Homewood als Céleste |
 | Peter Hudson als Father Ridley |
 | Tamar Baruch als Sister Amara |
 | Natalia Safran als Sister Chloe |
 | Maxime Elias-Menet als Jacques |
 | Pascal Aubert als Father Noiret |
 | Alexandra Gentil als Sister Astrid |
 | Florence Mestais als Double Demon Nun |
 | Margaux Borel als Double Demon Nun |
| Viviana Moin als Sister Maria |
| Renata Palminiello als Sister Pia |
| Fulvia Patrizia Olivieri als Abbess |
| Camille Amiel als Julie |
| Margot Morris als Aurélie |
 | Gaël Raës als Cedric the Altar Boy |
| Sarah Pachoud als Emily |
| Lieve Carchon als Sister Concetta |
 | David Horovitch als Cardinal Conroy |
 | Paul Spera als Deacon Scott |
 | Kate Colebrook als Irene's Mother / St. Lucy |
| Margot Bernazzi als Young Irene |
 | Grégory Di Meglio als Hotel Clerk |
 | Delcho Koprivshki als Ethan Rome |
| Philippe Josserand als Doctor |
 | Aaron-Jon North als Demon Goat |
 | Andrew Morgado als Demonic Voice (voice) |
 | Patrick Wilson als Ed Warren |
 | Vera Farmiga als Lorraine Warren |
| Michael Chaves | Director |
| James Wan | Producer |
| Peter Safran | Producer |
| Michael Clear | Executive Producer |
| Akela Cooper | Screenplay |
| Lainey Lipson | Casting Assistant |
| Richard Brener | Executive Producer |
| Dave Neustadter | Executive Producer |
| Tristan Nyby | Director of Photography |
| Ian B. Goldberg | Screenplay |
| Richard Naing | Screenplay |
| Gary Dauberman | Executive Producer |
| Victoria Palmeri | Executive Producer |
| Anne Fremiot | Casting |
| Rose Wicksteed | Casting |
| Stéphane Cressend | Production Design |
| Alexis McKenzie Main | Supervising Art Director |
| Dominique Moisan | Art Direction |
| Mathias Canard | Set Dresser |
| Emmanuel Delis | Set Decoration |
| Agnès Beziers | Costume Design |
| Tavares Audrey | Hairstylist |
| Véronique Boslé | Hairstylist |
| Suzel Jouguet | Key Makeup Artist |
| Kay Philips | Key Hair Stylist |
| Audrey Tavares | Hairstylist |
| Corinne Texier | Hairstylist |
| Félix Armand | Production Assistant |
| Nicolas Avrand | Assistant Production Coordinator |
| Xio Farias | Production Secretary |
| Arnaud Kaiser | Production Manager |
| Arnaud Kaiser | Unit Production Manager |
| Frederic Dagmey | Second Assistant Director |
| Jérémy Debord | Assistant Director |
| Jérémy Debord | Second Second Assistant Director |
| Manon Grach | Third Assistant Director |
| Tanya Larcinese | Third Assistant Director |
| Guilhem Malgoire | Second Unit Director |
| Frechon Marine | Set Production Assistant |
| Melvin Nkosi | Second Assistant Director |
| Jérémie Stachow | Set Production Assistant |
| Dylan Talleux | First Assistant Director |
| Chouchane Bakirel | Assistant Art Director |
| Roberto DiCamillo | Construction Buyer |
| Sue Elliott | Art Department Coordinator |
| Clémence Hamel | Set Decoration Buyer |
| Yannick Heuveline | Carpenter |
| Alexis Imbert | Standby Property Master |
| Clément Jolivet | Graphic Designer |
| Clément Langelin | Carpenter |
| Thomas Laporte | Painter |
| Mark Schons | Concept Artist |
| Simon Witte | Assistant Art Director |
| Lou Jullien | Sound Assistant |
| Erwan Kerzanet | Sound Mixer |
| Marco Peron | Boom Operator |
| Jean-Christophe Magnaud | Special Effects Supervisor |
| Wesley Barker | Visual Effects Production Manager |
| Dimitri Besicovitch | Stunt Double |
| Benjamin Colussi | Stunts |
| Andy Deschamps | Stunts |
| Sébastien Fouassier | Stunt Coordinator |
| Josue Daniel Acuña | Video Assist Operator |
| Nicolas Amedeo | Rigging Gaffer |
| Sepehr Azadi | First Assistant "A" Camera |
| Sylvain Bardoux | Key Grip |
| Tau Barut | Video Assist Operator |
| Michel Bouquerel | Gaffer |
| Sarah Boutin | Second Unit First Assistant Director |
| Brayan Cadoret | Grip |
| Antoine Charveriat | First Assistant Camera |
| Margaux Escourolle | Second Assistant "B" Camera |
| Hugues Espinasse | Second Unit Director of Photography |
| Jean-Charles Etien | Grip |
| Andres Gomez Orellana | First Assistant "B" Camera |
| Florine Jacquemot | Additional Second Assistant Camera |
| Kevin Kaiser | Camera Trainee |
| Eric Larsen | Dolly Grip |
| Matthieu Lornat | Camera Operator |
| Matthieu Lornat | Steadicam Operator |
| Baptiste Marnière | Digital Imaging Technician |
| Strasser Matteo | Grip |
| Guillaume Mondin | Best Boy Grip |
| Alexandre Monteau | Steadicam Operator |
| Alexandre Monteau | "B" Camera Operator |
| Matteo Nira Mancini | Grip |
| Sarah Okendo | Second Assistant Camera |
| Mathieu Poudevigne | Electrician |
| Rémi Quilichini | Steadicam Operator |
| Yohann Ramsawmy | Electrician |
| Pauline Rey | Second Assistant "A" Camera |
| Benjamin Rigot | Electrician |
| Julien Rizzo | Electrician |
| Quentin Roddier | Data Management Technician |
| Pietro Rosso | Electrician |
| Dweezil Rotily | Electrician |
| Laurent Schepman | Best Boy Grip |
| Bastien Semeriva | Electrician |
| Michel Strasser | Key Grip |
| Jérôme Tanguy | Digital Imaging Technician |
| Laurent Usse | Grip |
| Clément Valette | Best Boy Electric |
| Aurélie Avram | Casting Associate |
| Etienne Beck | Casting Coordinator |
| Sophie Kingston-Smith | Casting Associate |
| Peggy Quetglas | Extras Casting Assistant |
| Michèle Pezzin | Assistant Costume Designer |
| Darren Hallihan | Assistant Editor |
| Jackie Mata | Dailies Manager |
| Frank Quatrone | Dailies Operator |
| Philip Thomas | Assistant Location Manager |
| Axel Sorensen | Assistant Location Manager |
| Serop Cheikhoyan | Assistant Script |
| Stephanie Le Jamtel | Script Supervisor |
| Laura Gaubert | Driver |
| Akela Cooper | Story |
| James Wan | Characters |
| Gary Dauberman | Characters |
| Judson Scott | Executive Producer |
| Michael Polaire | Executive Producer |
| Gregory Plotkin | Editor |
| Sophie Leclerc | Visual Effects Producer |
| Marco Beltrami | Original Music Composer |
| John Marquis | Sound Re-Recording Mixer |
| Zach Pino | Sound Effects Editor |
| Jason W. Jennings | Supervising Sound Editor |
| Jason W. Jennings | Sound Designer |
