Michael Chaves Director Taissa Farmiga Sister Irene Actor Jonas Bloquet Frenchie Actor Storm Reid Debra Actor Anna Popplewell Marcella Actor Bonnie Aarons The Demon Nun Actor Katelyn Rose Downey Sophie Actor Suzanne Bertish Madame Laurent Actor Léontine d'Oncieu Simone Actor Anouk Darwin Homewood Celeste Actor Peter Hudson Father Ridley Actor Tamar Baruch Sister Amara Actor Natalia Safran Sister Chloe Actor Maxime Elias-Menet Jacques Actor Pascal Aubert Father Noiret Actor Alexandra Gentil Sister Astrid Actor Ian Goldberg Screenwriter Richard Naing Screenwriter Akela Cooper Screenwriter Peter Safran Producer James Wan Producer Richard Brener Executive Producer Dave Neustadter Executive Producer Victoria Palmeri Executive Producer Gary Dauberman Executive Producer Michael Clear Executive Producer Judson Scott Executive Producer Michael Polaire Executive Producer Tristan Nyby Cinematographer Gregory Plotkin Film Editing Marco Beltrami Original Music Stéphane Cressend Production Design Dominique Moisan Art Director Alexis McKenzie Main Art Director Emmanuel Delis Set Decoration Agnès Beziers Costume Design Anne Fremiot Casting Rose Wicksteed Casting