Kaley Cuoco Shares Cuddly Photo with Karl Cook Love is in the air for Kaley Cuoco. The Big Bang Theory star is really happy — and it’s all because of her new boyfriend, equestrian Karl Cook. “That’s what happy looks like,” she captioned the shot alongside a heart emoji. It’s nice to see her smiling again. Happiness looks great on her, especially since Cuoco hasn’t had the greatest year in terms of love.