Schitt's Creek actress Catherine O'Hara's cause of death has been revealed to be a pulmonary embolism, with rectal cancer as an underlying condition, according to TMZ, as quoted by Variety, which obtained her death certificate on Monday.

The actress passed away on January 30 at her Los Angeles home after being hospitalised early that morning with an illness. Paramedics had been called to her home at 4:48 a.m. that morning, according to Page Six as quoted by Variety.