The world of entertainment mourned the loss of beloved actress Catherine O'Hara, who passed away from a pulmonary embolism, with cancer as the underlying cause. Tributes poured in for the Home Alone star, who died on January 30 at the age of 71. A Los Angeles County death certificate revealed that the embolism was the immediate cause of her death at a hospital in Santa Monica, California, while rectal cancer was listed as the long-term cause. O'Hara's oncologist had been treating her since March of the previous year. O'Hara's talent was celebrated by her peers, including Meryl Streep, Macaulay Culkin, Michael Keaton, and Seth Rogen. Eugene Levy, her on-screen husband in the US sitcom, struggled to find words to express his grief, stating that he had the honor of knowing and working with her for over 50 years. He cherished their working relationship and their friendship. Alec Baldwin, who starred with her in Beetlejuice, praised her as one of the greatest comic talents in the movie business, with a unique quality. O'Hara's recent role in The Last Of Us, alongside Pedro Pascal, showcased her genius, and he expressed eternal gratitude for having her in his world. A pulmonary embolism, a life-threatening condition where a blood clot blocks a blood vessel in the lungs, was the immediate cause of her death, according to the NHS.