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Catherine O'Hara's Cause Of Death Revealed

By Louise Ducrocq
10/02/2026
Est. Reading: 3 minutes

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Catherine O'Hara

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The official cause of death for Catherine O’Hara has now been publicly confirmed. According to her death certificate released by the Los Angeles County Department of Public Health, the beloved Canadian-born actress died from a pulmonary embolism, a life-threatening condition that occurs when a blood clot travels to and blocks an artery in the lungs. Rectal cancer was listed on the certificate as the underlying cause that contributed to her passing.

O’Hara, who died on January 30, 2026, was 71 years old at the time of her death. The oncologist who signed her death certificate had been treating her since March 2025 and last saw her just days before her passing. She was taken to a hospital in Santa Monica, California, after experiencing serious breathing difficulties.

A pulmonary embolism can strike suddenly and with little warning, particularly in people with underlying health conditions such as cancer. The condition can lead to rapid respiratory distress and is often fatal if not treated immediately.

O’Hara was cremated, and her remains were entrusted to her husband, Robert “Bo” Welch.

Catherine O’Hara is widely regarded as one of the most versatile and influential performers in modern comedy, celebrated for a career that has spanned more than five decades across film, television and theatre.

Born in Toronto, Canada, O’Hara began her career in the early 1970s as part of the city’s vibrant improvisational comedy scene. Her breakthrough came when she joined the legendary sketch series Second City Television (SCTV), where her ability to create sharply observed, fully realised characters quickly set her apart. On the show, she displayed an extraordinary range — moving effortlessly between absurd satire and grounded emotional comedy — and earned widespread critical acclaim.

O’Hara transitioned seamlessly into film, becoming a regular collaborator of director Christopher Guest. Their mockumentary-style films allowed her improvisational skills to flourish, resulting in some of her most iconic performances. She starred in Waiting for Guffman, Best in Show, A Mighty Wind, and For Your Consideration, often portraying characters driven by fragile egos, artistic ambition and quiet vulnerability. Her work in these films is frequently cited as masterclass-level comedic acting, balancing humour with empathy rather than caricature.

For mainstream audiences, O’Hara is perhaps best known for her role as Kate McCallister in the holiday classic Home Alone and its sequel Home Alone 2: Lost in New York. Her performance as the frantic yet loving mother became a defining part of the films’ enduring appeal and cemented her status as a household name.

@freeform there's no reunion like a mccallister reunion #HomeAlone2 #25DaysOfChristmas #Holiday #HolidayWhatToWatch #FestiveMovie #FestiveFunnyMovies ♬ original sound - Freeform

Later in her career, O’Hara experienced a remarkable creative resurgence with Schitt’s Creek, where she portrayed the flamboyant, deeply insecure former soap star Moira Rose. The role is now considered one of the greatest television performances of the 21st century. Through Moira’s exaggerated diction, theatrical costumes and emotional fragility, O’Hara created a character that was both outrageous and profoundly human. Her work on the series earned her multiple awards, including an Emmy, and introduced her to a new generation of viewers.

@catherineoharasbebe Moira is an icon #fyp #foryou #foryoupage #schittscreek #catherineohara #moirarose ♬ original sound - catherineoharasbebe

Beyond comedy, O’Hara demonstrated her dramatic range in films such as Beetlejuice, After Hours, Temple Grandin, and The Last of Sheila, as well as voice roles in animated features including The Nightmare Before Christmas, Frankenweenie, and Elemental. Her voice work, like her on-screen performances, is marked by precision, warmth and an instinctive understanding of character.

Throughout her career, O’Hara has been praised not just for being funny, but for elevating comedy into something emotionally resonant and artistically serious. She has influenced generations of performers, particularly women in comedy, by proving that boldness, intelligence and vulnerability can coexist.

@disneyuk Your chance to run lines with the McCallisters. Watch all of the Home Alone films on @disneyplusuk #HomeAlone #DisneyUK ♬ original sound - Disney UK

With a body of work that bridges cult classics and mainstream favourites, Catherine O’Hara’s contribution to film and television remains enduring — a testament to a performer whose artistry has always been rooted in truth, imagination and fearless creativity.

Louise Ducrocq

Written by Louise Ducrocq

Louise is an expert content creator, and online author for Radio Nova. She's evolved in a few different fields, including mental health and travel, and is now excited to be part of the wonderful word of Radio.

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