Catherine O‘Hara’s Cause of Death Reveals Private Cancer Battle With a Pulmonary Embolism

According to her death certificate, the actress died on Jan. 30 from a life-threatening blood clot with rectal cancer being listed as the underlying cause.

Catherine O'Hara, a cast member in the Apple+ series "The Studio," poses for a portrait in Los Angeles on March 20, 2025. Chris Pizzello/AP Photo

The cause of death of Emmy award-winning actress Catherine O’Hara was revealed to be a result of a pulmonary embolism while battling cancer.

According to her death certificate from the Los Angeles County Medical Examiner’s Office, O’Hara died on Jan. 30 at the age of 71, with rectal cancer being listed as the underlying cause.