Katheryn Winnick (born December 17, 1977) is a Canadian actress. She is known for her starring roles in the television series Vikings, Wu Assassins, Big Sky, and her recurring role on the television series Bones.
Sienna is a nineteen-year-old werewolf with a secret: she's a virgin. The only virgin in the pack. She's dead set on making it through this year's Haze without giving into her primal urges—but when she meets Aiden, the alpha, she forgets all about her self-control.
