Katheryn Winnick (born December 17, 1977) is a Canadian actress.
She is known for her roles in Amusement (2008), Bones (2010), A Glimpse Inside the Mind of Charles Swan III (2012), Vikings (2013–2020), The Art of the Steal (2013), Polar (2019) and Wu Assassins (2019).
Winnick was born in Etobicoke, Ontario, and is of Ukrainian descent. She spoke Ukrainian as her first language and did not begin speaking English until she was eight years old. She began training in martial arts at age seven, and obtained her first black belt at 13. By age 21, she had started three Taekwondo schools. She taught Taekwondo and self-defense to actors while completing her degree in kinesiology at York University, Toronto.
Winnick has appeared in many films, including Stand Up Guys, Failure to Launch, Love & Other Drugs, and Killers. She has guest-starred in numerous television shows, most notably House, The Glades, Bones, Law & Order, Law & Order: Criminal Intent, CSI, CSI: NY, CSI: Miami, Criminal Minds, Person of Interest, and Nikita. In her role on Bones, she portrays Hannah Burley, a war correspondent who had been posted to cover the war in Afghanistan and becomes a love interest for main character Seeley Booth.