Catherine O'Hara's Schitt's Creek costars are mourning the death of their former costar. "What a gift to have gotten to dance in the warm glow of Catherine O'Hara's brilliance for all those years," Dan Levy wrote via Instagram on Friday, January 30. "Having spent over fifty years collaborating with my Dad, Catherine was extended family before she ever played my family. It's hard to imagine a world without her in it." O'Hara died on Friday, January 30, at age 71. O'Hara's agency CAA shared via a statement that she died "at her home in Los Angeles following a brief illness.