'Vikings' Star Katheryn Winnick

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Katheryn Winnick makes her first visit to Rachael Ray, and she's giving the scoop on what it's like to act on TV's breakout hit, Vikings! Then, the Canadian-born beauty -- who began training in martial arts at age seven --shows off some of her best moves on co-host Bobby Flay! Who will win this Vikings battle? Tune in to find out!

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