The couple started dating in October 2014 after Kat was introduced to Josh by her 2 Broke Girls costar Beth Behrs. "He's just a genius," the actress gushed to Ellen DeGeneres in 2015. Josh expressed similar sentiments during his own appearance on The Ellen DeGeneres Show that same year, saying, "Humour is such a huge thing for me, so, you know, the fact that we could talk about Monty Python and all sorts of weird other things, I was like, 'OK yeah, we're on the same page.'" They dated until August 2016 when the pair mutually decided to break up.