 | Jena Malone als Grace |
 | Danny Huston als Father Romero |
 | Thoren Ferguson als DCI Harris |
 | Janet Suzman als Mother Superior |
 | Ian Pirie als Vincent |
 | Steffan Cennydd als Michael |
 | Will Keen |
 | Alexandra Lewis als Sister Beth |
 | Kit Rakusen als Young Michael |
 | Eilidh Fisher als Meg |
 | Jolade Obasola als Sister Matilda |
| Marilyn O'Brien als Nurse |
 | David Boyle als Adoption Manager |
| Angela White als Nun |
 | Emma Hixson als Nun |
| Rachael Joanne Brown als Nun |
| Charlotte Palmer |
| Michael Brophy als Father Jacobs |
| Daisy Allen als Young Grace |
| Christopher Smith | Director |
| Christopher Smith | Writer |
| Laurie Cook | Writer |
| Laurie Cook | Producer |
| Xavier Marchand | Producer |
| Jason Newmark | Producer |
| Casey Herbert | Producer |
| Alastair Burlingham | Executive Producer |
| Stuart Ford | Executive Producer |
| Ed Fraiman | Executive Producer |
| Linda McDonough | Executive Producer |
| Adam Nagel | Executive Producer |
| Miguel Palos | Executive Producer |
| Jack Tarling | Line Producer |
| Rob Hart | Director of Photography |
| Shaun Mone | Director of Photography |
| Alex Johnson | Casting |
| Elizabeth El-Kadhi Brown | Production Design |
| Emily Newby | Costume Design |
| Arthur Davis | Editor |
| Liz Arklie | Makeup Supervisor |
| Nicky Austin | Makeup Designer |
| Sarah Harris | Makeup Trainee |
| Nikoleta Tzani | Prosthetic Makeup Artist |
