Dan Levy is opening up about what's given him "comfort" amid the devastating loss of Catherine O'Hara. The actor went on The Tonight Show on Tuesday and chatted with host Jimmy Fallon about his beloved Schitt's Creek co-star. He said in the interview: "Listen, it's like a collective loss, I think. She was the greatest. She's irreplaceable." He said it all right there. The industry has taken such a huge loss! Related: Inside Catherine's Final Public Appearance Before Shocking Death He's been able to find solace amid his grief, though.