| Darsteller | Rolle |
|---|---|
| Olivia Williams | Reverend Mother Tula Harkonnen (6) |
| Emily Watson | Mother Superior Valya Harkonnen (6) |
| Mark Addy | Evgeny Harkonnen (6) |
| Barbara Marten | Sister Avila (6) |
| Yerin Ha | Young Kasha Jinjo (3) Young Kasha (6) |
| Tabu | Sister Francesca (6) |
| Edward Davis | Harrow Harkonnen (6) |
| Josh Heuston | Constantine Corrino (6) |
| Chloe Lea | Sister Lila (6) |
| Aoife Hinds | Sister Emeline (6) |
| Shalom Brune-Franklin | Mikaela (6) |
| Sarah-Sofie Boussnina | Princess Ynez Corrino (6) |
| Chris Mason | Keiran Atreides (6) |
| Jade Anouka | Sister Theodosia (6) |
| Mark Strong | Emperor Javicco Corrino (6) |
| Faoileann Cunningham | Sister Jen (6) |
| Travis Fimmel | Desmond Hart (6) |
| Jodhi May | Empress Natalya Arat Corrino (6) |
| Jessica Barden | Young Valya Harkonnen (4) |
| Camilla Marie Beeput | Reverend Mother Dorotea (4) |
| Sam Spruell | Horace (2) |
| John Nolan | Speaker for the Hall |
| Sarah Lam | Hagal Truthsayer (3) |
| Lucy Russell | Gbangbala Truthsayer (3) |
| Sarah Oliver-Watts | Young Avila (3) |
| Ayodele Shekoni Rilwan | Ecaz Noble (3) |
| Sam Pembroke | Bagrationi Noble (3) |
| Iklaga Gabriel Inalegwu | Tantor Noble (3) |
| Earl Cave | Griffin Harkonnen (3) |
| Tanya Moodie | |
| Cathy Tyson | Raquella Berto-Anirul (3) |
| Emma Canning | Young Tula Harkonnen (3) |
| Charithra Chandran | Young Francesca (3) |
| Léo Lambert | Gbangbala Consort (2) |
| Brendan Cowell | Duke Ferdinand Richese (2) |
| Rentsenkhorioo Enkhbold | Yasu Noble (2) |
| Janka József | Vernius Noble (2) |
| Karima McAdams | Sister Nazir (2) |
| Tom Swale | Trooper (2) |
| Lorena Santana-Somogyi | Dorotea's Disciple (2) |
| Callum Coates | Lord Hagal (2) |
| Viola Lotti Gombó | Dorotea's Disciple (2) |
| Flora Montgomery | Truthsayer Vera (2) |
| Jihae | Kasha Jinjo (2) |
| Nicola Alexis | Yaoufirks Truthsayer (2) |
| Laura Howard | Duchess Orla Richese (2) |
| Parker Sawyers | Baron Tojan Gbangbala (2) |
| Tess Bonham-Jones | Lady Shannon Richese (2) |
| Attila Árpa | Baron Yaoufirks |
| Carna Krsul | Acolyte |
| Karabo Moelesti | Acolyte |
| Steve Oram | Duri |
| Andrea Staline de Carvalho Rodrigues | Acolyte |
| Milo Callaghan | Orry Atreides |
| Harry Szovik | Mustachioed Customer |
| Mina Latham | Emeline Follower |
| Tom Swale | Trooper |
| Regina Turóczi | Dorotea's Disciple |
| Barnabás Réti | Imperial Guard |
| Kevin Ogunleye | Imperial Guard |
| Will Bowden | Imperial Guard |
| Luca Papp | Acolyte |
| Paula Calvo Suárez | Dorotea's Disciple |
| Liam Reilly | Imperial Guard |
| Paula Parducz | Dorotea's Disciple |
| Liam Reilly | Imperial Guard |
| Dezső Farkas | Wiry Man |
| Rebecka Johnston | Dorotea's Funeral Disciple |
| Payal Vashist | Dorotea's Funeral Disciple |
| Ade Dimberline | Leering Man |
| Krisztián Csákvári | Scantily Clad Man |
| Charlie Hodson-Prior | Pruwet Richese |
| Eva Alpysbay | Lady Hagal |
| Hannah Khalique-Brown | Sister Farouz |
| Elizabeth Hollingshead | Imperial Cryer |
| Roland Imre | Head Guard |
| Csilla Kőműves | Naked Young Woman |
| Ludovic Hughes | Cousin Ronan Atreides |
| Linda Fekete | Middle-Aged Woman |
| Indra Tsolmon | Woman for Constantine |
| Kristóf Widder | Wounded Soldier |
| William Johnson | Harkonnen |
| Polly Walker | Sonia Harkonnen |
| David Bark-Jones | Vergyl Harkonnen |
| Archie Barnes | Albert |
| Benedick Blythe | Uncle Shander |
| Zsófia Miklós | Acolyte |
| Wayne Brett | Butcher |