Travis Fimmel – Ragnar Lothbrok
Born and raised in the lands near Kattegat in southern Norway, Ragnar Lothbrok was the protagonist of the show until his eventual death in Season 4. He grew up to earn a reputation of being a clever boy, killing the Norwegian King Siward at the early age of 15.
Ragnar was the ex-husband of Lagertha, the father of Gyda and Bjorn, and the brother of Rollo.
Gustaf Skarsgård - Flóki
Floki, who also happens to be Ragnar Lothbrok’s peculiar and closest friend, is a boat builder and inveterate trickster. He is also the father of the late Angrboda, the adoptive father of the late Tanaruz, and the husband of the late Helga.
The actor behind the role, Gustaf Caspar Orm Skarsgård, is actually one of the rare true Scandinavians on the show. The actor’s father, Stellan Skarsgård, is actually known for playing the role of Bootstrap Bill Turner in Pirates of the Caribbean movies and Professor Gerald Lambeau in Good Will Hunting, among his other titles.
Gustaf Skarsgård - Flóki
Gustaf Skarsgård is a Swedish actor, best known outside Scandinavia for his role on the show, as well as his roles in the films The Way Back, Evil, and Kon-Tiki.
Most recently, he played the role of Karl Strand in the second season of the hit HBO series Westworld. Though Flóki has a distinct bearded look, Gustaf actually prefers a clean-shaven and professional look in real life.
Travis Fimmel - Ragnar Lothbrok
Travis Fimmel is an Australian actor and former model, well known for his role in Tarzan as Tarzan himself, besides his role on the show.
He also played the role of McQueen Oodie in The Baytown Outlaws and Anduin Lothar in Warcraft: The Beginning! Josefin Asplund - Astrid
Josefin Asplund - Astrid
Astrid is introduced in Season 4 as the shield-maiden and the former lover of Lagertha.
She entered the show as part of Lagertha’s court at Hedeby where she was set to train Astrid in the arts of love and of course, the arts of war.