The cause of death for actor Catherine O'Hara has been revealed.⁠ ⁠ Sources confirmed to NBC4 Investigates in Los Angeles that pulmonary embolism was the immediate cause, with rectal cancer as the sequential cause of death.⁠ ⁠ Tap the 🔗 in our bio to learn more.⁠ ⁠ #catherineohara #causeofdeath #homealone⁠