Katheryn Winnick is a Canadian actress. She is known for her starring roles in the television series Vikings (2013–2020), Wu Assassins (2019), and Big Sky (2020–2023), and her recurring role on the television series Bones (2010–2011). She also starred in the films Amusement (2008), Choose (2010), A Glimpse Inside the Mind of Charles Swan III (2012), The Art of the Steal (2013), Polar (2019), and The Marksman (2021).