Taissa Farmiga Sister Irene Jonas Bloquet Maurice Theriault Storm Reid Debra Anna Popplewell Kate Bonnie Aarons The Nun / Valak Katelyn Rose Downey Sophie Suzanne Bertish Madame Laurent Peter Hudson Father Ridley Tamar Baruch Sister Amara Natalia Safran Sister Chloe Maxime Elias-Menet Jacques Pascal Aubert Father Noiret Vera Farmiga Lorraine Warren Patrick Wilson Ed Warren Alexandra Gentil Sister Astrid Florence Mestais Double Demon Nun Gaël Raës Cedric the Altar Boy David Horovitch Cardinal Conroy Paul Spera Deacon Scott Kate Colebrook Irene's Mother / St. Lucy Taissa Farmiga Sister Irene Jonas Bloquet Maurice Theriault Storm Reid Debra Anna Popplewell Kate Bonnie Aarons The Nun / Valak Katelyn Rose Downey Sophie Suzanne Bertish Madame Laurent Peter Hudson Father Ridley Tamar Baruch Sister Amara Natalia Safran Sister Chloe Maxime Elias-Menet Jacques Pascal Aubert Father Noiret Vera Farmiga Lorraine Warren Patrick Wilson Ed Warren Alexandra Gentil Sister Astrid Florence Mestais Double Demon Nun Gaël Raës Cedric the Altar Boy David Horovitch Cardinal Conroy Paul Spera Deacon Scott Kate Colebrook Irene's Mother / St. Lucy Grégory Di Meglio Hotel Clerk Delcho Koprivshki Ethan Rome Andrew Morgado Demonic Voice (voice)