
Oisin Murray as Tarben, a young boy at Lagertha's village.Kathy Monahan as Eira, a former shield-maiden at Lagertha's village.David Sterne as Gudmund, an old man at Lagertha's village.Gina Costigan as Runa, a former shield-maiden at Lagertha's village.Eve Connolly as Thora, Hvitserk's murdered love interest, appearing in his delusions.Conn Rogers as Canute, a member of King Olaf's court.Serena Kennedy (part 1) and Isabelle Connolly (part 2) as Anna, Dir's wife.Oran Glynn O'Donovan as Prince Igor, the preadolescent heir of Kiev and Oleg's ward.Lenn Kudrjawizki as Prince Dir of Novgorod, Oleg's brother.Adam Copeland as Kjetill Flatnose (/ʃjetil/), the chief of the Icelandic settlement.Ryan Henson as Hali, Bjorn and Torvi's son.Elodie Curry as Asa, Bjorn and Torvi's daughter.Andrei Claude as Ganbaatar, Oleg's captain.Kristy Dawn Dinsmore as Amma, a shield-maiden in Kattegat who is fond of Hvitserk.Kieran O'Reilly as White Hair, Ivar's former bodyguard and an outlaw (part 1).After Bjorn's death, she marries King Harald and becomes Queen of Kattegat. Lucy Martin as Queen Ingrid, a slave serving Gunnhild and Bjorn in Kattegat and, later, Bjorn's second wife.Jasper Pääkkönen as Halfdan the Black, Harald's violent younger brother, appearing in a vision (part 2).Gustaf Skarsgård as Floki, a gifted shipbuilder (part 2).Ray Stevenson as Othere, a mysterious wanderer.Ragga Ragnars as Queen Gunnhild, Bjorn's wife, queen of Kattegat and a shield-maiden.Georgia Hirst as Torvi, Ubbe's wife and a shield-maiden.After Harald's departure for England, he makes himself King of Kattegat alongside Queen Ingrid. Eric Johnson as King Erik, an outlaw who helps Bjorn.Peter Franzén as King Harald Finehair, a Viking warlord intended to become the first King of All Norway.John Kavanagh as The Seer, the former seiðrmann of Kattegat, appearing in visions.Danila Kozlovsky as Prince Oleg the Prophet, the Varangian grand prince of Kiev who welcomes Ivar at his court.Jordan Patrick Smith as Ubbe, eldest son of Ragnar and Aslaug and Torvi's husband.After the death of Thora, he becomes a drunkard. Marco Ilsø as Hvitserk, second son of Ragnar and Aslaug.After fleeing Kattegat, he finds refuge in Rus'. Alex Høgh Andersen as King Ivar the Boneless, fourth son of Ragnar and Aslaug and former king of Kattegat.

Nathan O'Toole portrays a young Bjorn Ironside, appearing in a flashback.Alexander Ludwig as King Bjorn Ironside, Ragnar and Lagertha's son, king of Kattegat, and husband to Gunnhild and Ingrid.Katheryn Winnick as Lagertha, a shield-maiden, Ragnar's first wife and former queen of Kattegat (part 1).Main article: List of Vikings characters Main
