Katheryn Winnick is a Canadian actress and director, best known for her role as Lagertha in the historical drama series Vikings. Born on December 17, 1977, in Etobicoke, Ontario, she has a background in martial arts and holds a black belt in Taekwondo. In addition to her work on Vikings, Winnick has appeared in various television shows and films, including Bones and The Art of the Steal. She has received critical acclaim for her performances and has been involved in several charitable organizations, focusing on issues such as women's empowerment and education.