- Studied acting at New York’s William Esper Studio.
- Won silver medals at the Canadian National Tae Kwon Do finals.
- Got kicked out of summer camp for “reckless behavior” when she was 14.
- Her brother Adam is a Canadian soldier fighting in Afghanistan.
- Holds a 3rd-Degree Black Belt in Tae Kwon Do, a 2nd-Degree Black Belt in Karate, and is a licensed bodyguard.
- Opened her first martial arts studio at the age of sixteen, Win Kai Martial Arts, which quickly expanded to three successful branches in New York and Toronto.
- Chosen by Vanity Fair to appear in the magazine’s high-profile and highly-selective “Vanities” section (September 2009).
- Was handpicked from thousands of aspiring young actors to be featured in the initial season of Bravo’s popular documentary TV series, The It Factor (2002).
- Her brother Markjan Winnick is also an actor.
- Katheryn’s last name of ‘Winnick’ means ‘winemaker’ when expressed in Ukrainian.