Jessalyn Gilsig – Siggy Haraldson
Siggy Haraldson is known on the show as the enigmatic wife of the late Earl Haraldson, the former chief of the Vikings based in Kattegat.
During King Earl’s reign, Siggy performed her duties with excellence and was very much admired by many.
Alex Høgh Andersen - Ivar
Ivar Ragnarsson, actually named Ivar the Boneless by his father, is the psychopathic son of Aslaug and Ragnar Lothbrok. He is determined to seek revenge on Lagertha for the murder of his mother, Aslaug.
Ivar and the actor behind the role actually are both beardless, just with incredibly different hairstyles.
Alex Høgh Andersen - Ivar
Alex Høgh Andersen is a Danish actor, mainly known for his role as Ivar on the show. He was born and raised in the small town of Copenhagen and discovered his passion for acting while pursuing drama at school.
Though his acting may say otherwise, Alex is actually significantly less intimidating in real life, looking more like a fashion model than a murderer.
Jessalyn Gilsig - Siggy Haraldson
Jessalyn Gilsig is a Canadian-American actress known for her many roles in television series that include Boston Public, Nip/Tuck, Glee, and of course, Vikings.
The actress began her acting career in a voice work part for a National Film Board of Canada production, Masquerade, at the young age of 12.
Ida Nielsen - Margrethe
Margrethe is known as the former slave residing in Kattegat that turned into a free woman. During her years as a slave, she was shared by all four sons of Ragnar and Aslaug.
Though she became a lover to each of them, she ultimately became the wife of Ubbe, son of Ragnar, who is responsible for freeing her from slavery.