The star died on January 30 at a Los Angeles hospital, with a blood clot in her lungs identified as the immediate cause.

Emmy-winning actor Catherine O'Hara died from a blood clot in her lungs as a result of rectal cancer, according to her death certificate. Her official cause of death was listed as a "pulmonary ...

Catherine O'Hara's cause of death has been confirmed more than a week after the award-winning actress died at 71 on Jan. 30.

Catherine O'Hara's cause of death — and a private battle with cancer — has come to light weeks after the 'Schitt's Creek' and 'Home Alone' star died at 71.