Article continues below advertisementFans were shocked to learn that legendary Hollywood actress Catherine O'Hara, known for her roles on Home Alone and Schitt's Creek, died on January 30, and are curious to learn the cause of her death. Article continues below advertisementWhat Was Catherine O'Hara's Cause of Death? Source: MEGACatherine O'Hara's death was confirmed on January 30. The Schitt's Creek actress died on Friday, January 30, two sources with direct knowledge told TMZ. She was 71. "We are saddened to announce the passing of Catherine O'Hara," CAA shared in a statement to Page Six.