| Alex Høgh Andersen | Ivar |
| Marco Ilsø | Hvitserk |
| Jordan Patrick Smith | Ubbe |
| Georgia Hirst | Torvi |
| Ragga Ragnars | Gunnhild |
| John Kavanagh | The Seer |
| Eric Johnson | Erik |
| Danila Kozlovskiy | Prince Oleg the Prophet |
| Peter Franzén | King Harald Finehair |
| Ray Stevenson | Othere |
| Adam Copeland | Kjetill Flatnose |
| Brent Burns | Skane |
| Lenn Kudrjawizki | Prince Dir |
| Lucy Martin | Ingrid |
| Kelly Campbell | Ingvild |
| Alicia Agneson | Katia |
| Ivo Alexandre | Bishop Leon |
| Guy Carleton | Patriarch /
Russian Priest |
| Oran Glynn O'Donovan | Igor |
| Scott Graham | Frodi |
| Tristan McConnell | Greenland Settler |
| Ciaran O'Grady | Greenland Settler
(as Ciarán O'Grady) |
| Finn Gillespie | Young Viking |
| Noella Brennan | Gudrid |
| Moah Madsen | Gunnhild's Servant |
| Isabelle Connolly | Anna |
| Lee Bennett | Eastern Rus Noble |
| Aisling Reid | Harold's Servant |
| Emily Fox | Harold's Servant |
| Katie McCann | Harold's Servant |
| Muireann Bird | Harold's Servant |
| Niall Ó Sioradáin | Chief Priest
(as Niall Ó'Sioradáin) |
| Thomas Quill | Icelandic Settler
(uncredited) |