There was a real Ragnar Lothbrok, and yes ... Bjorn Ironside was a son of Ragnar, but he was not a son of Lagertha. Instead, ...
Kathryn Winnick sold her performance as Lagertha among the stellar cast for ... chemistry she shared with her on-screen husband, Ragnar Lothbrok (played by Australian actor Travis Fimmel).
The story follows Ragnar Lothbrok, played by Travis Fimmel in ... Ragnar and his wife, Lagertha—played wonderfully by Katheryn Winnick—have a daughter, Gyda (Ruby O'Leary) and a son, Bjorn ...