| Katheryn Winnick | Lagertha |
| Alexander Ludwig | Bjorn Lothbrok |
| John Kavanagh | The Seer |
| Alex Høgh Andersen | Ivar |
| Marco Ilsø | Hvitserk |
| Jordan Patrick Smith | Ubbe |
| Eric Johnson | Erik |
| Danila Kozlovskiy | Oleg of Novgorod |
| Peter Franzén | King Harald Finehair |
| Adam Copeland | Kjetill Flatnose |
| Georgia Hirst | Torvi |
| Steven Berkoff | King Olaf the Stout |
| Ragga Ragnars | Gunnhild |
| Lucy Martin | Ingrid |
| Alicia Agneson | Katia |
| Adam Behan | Warrior 1 |
| Adam Traynor | Warrior 2 |
| Kristy Dawn Dinsmore | Amma |
| Patrick O'Donnell | Dealer |
| Mishaël Lopes Cardozo | King Hakon |
| Bobby McGlynn | Blind Beggar |
| Elodie Curry | Asa |
| Oran Glynn O'Donovan | Igor |
| Niall Ó Sioradáin | Chief Priest
(as Niall O'Sioradain) |
| Emma Willis | Gyda |
| Nicolas Van Beveren | Stranger |
| Alex Mills | First Young Viking |
| Niall O'Brien | Second Young Viking |
| John Hogg | Third Young Viking |
| Karen Connell | Angel of Death |
| Lianne Bowley | Shield Maiden
(uncredited) |
| Katie Castle | Shield Maiden
(uncredited) |
| Jordan Coombes | Shield Maiden
(uncredited) |
| Jessy Danner | Shield Maiden
(uncredited) |
| Joseph Duggan | Viking
(uncredited) |
| Karin Floengard Jonsson | Shield Maiden
(uncredited) |
| Niamh Hogan | Shield Maiden
(uncredited) |
| Lucy Johnson | Shield Maiden
(uncredited) |
| Tom Leavey | Villager
(uncredited) |
| Michelle O'Flaherty | Shield Maiden
(uncredited) |
| Laura Sibbick | Shield Maiden
(uncredited) |