Twenty-three years after John Ritter’s sudden death stunned Hollywood, his family is still trying to make sure what happened to him doesn’t happen to someone else.
The beloved Three’s Company star was only 54 when he became ill while working on 8 Simple Rules on September 11, 2003. What initially appeared to be a heart attack turned out to be something very different: an acute aortic dissection, a dangerous tear in the wall of the body’s largest artery. (John Ritter Foundation)
Now, around what would have been John’s 78th birthday, his widow Amy Yasbeck and his children are once again speaking publicly about the condition.
His son Tyler Ritter summed up their mission simply: “We’re just ringing the alarm.” (New York Post)
And the Ritter family has a deeply personal reason for doing it.
John thought he was having a heart attack
September 11, 2003 began as another working day for Ritter.
He was filming 8 Simple Rules… for Dating My Teenage Daughter, the ABC sitcom in which he played Paul Hennessy opposite Katey Sagal and a young Kaley Cuoco.
Then he became seriously ill.
Ritter was taken to the hospital with symptoms that doctors initially treated as a heart attack. His condition rapidly deteriorated, and he died later that night. (John Ritter Foundation)
The actual cause was a type A aortic dissection.
An aortic dissection occurs when the inner layer of the aorta tears, allowing blood to enter the wall of the artery and separate its layers. It is a medical emergency and can become fatal extremely quickly.
For Amy Yasbeck, one of the most painful parts of John’s story is that the correct diagnosis didn’t come soon enough.
Speaking again about her husband’s death in September 2026, she emphasized how easily an aortic emergency can be confused with a heart attack. (ABC News)
That distinction became the driving force behind everything she did afterward.
Amy turned her grief into a mission
Only weeks after John’s death, Yasbeck began establishing what became the John Ritter Foundation for Aortic Health.
Its purpose was straightforward: raise awareness, support research and help doctors and patients recognize thoracic aortic disease before another family experienced the same kind of sudden loss. (John Ritter Foundation)
More than two decades later, the foundation remains active.
According to its current figures, approximately 20,000 people in the United States experience an aortic dissection each year, and as many as half may die. The foundation says prompt diagnosis and treatment could raise survival to around 79%. (John Ritter Foundation)
For Amy, those aren’t abstract numbers.
Every statistic reminds her of John.
Then the Ritters began looking at their own family history
After John’s death, his family started asking questions about something that had once seemed almost ordinary in the Ritter family: sudden cardiac deaths.
Amy recalled hearing a grim saying about the family — that the Ritters tended to die from their “first and last heart attack.”
John’s father, country-music star Tex Ritter, had died suddenly in 1974 after collapsing with what was believed to be a heart attack.
He was 69.
But after discovering what had actually killed John, his family began wondering whether Tex’s death might also have involved an undiagnosed aortic problem. That possibility has not been definitively established, but it made the family’s medical history impossible to ignore. (New York Post)
Then came an even more startling discovery involving John’s brother.
A scan may have saved John’s brother
John’s older brother, Tom Ritter, underwent screening.
Doctors discovered an aortic aneurysm.
Unlike John, Tom had the enormous advantage of knowing it was there before it became catastrophic. He was able to undergo treatment rather than discovering the problem during an emergency. (New York Post)
For the Ritter family, that experience demonstrated exactly what their foundation had been trying to explain.
Sometimes the first warning of aortic disease can arrive dangerously late.
But when people with increased risk are identified and appropriately monitored, doctors may be able to intervene before a dissection occurs. The foundation specifically identifies a personal or family history of thoracic aortic disease as an important risk factor. (John Ritter Foundation)
That realization also changed the way John’s children approach their own health.
John’s children now undergo regular screening
John was the father of four children: Jason, Carly, Tyler and Noah.
All four have remained connected to the foundation created in their father’s memory. (John Ritter Foundation)
Jason Ritter, now 46, recently revealed that he and his siblings undergo yearly scans because of their family history.
For Jason, those preventive appointments produced an unexpected discovery of their own.
During one of his screenings, he learned that he had type 1 diabetes. Jason said the diagnosis came roughly two years ago and dramatically changed how seriously he approached his health. (People.com)
He now uses medication and an insulin pump and pays considerably more attention to his diet.
Becoming a father has made those precautions feel even more important.
Jason shares a 7-year-old daughter with actress Melanie Lynskey, and he has spoken about wanting to remain healthy and present as she grows up. (People.com)
Tyler has become another voice for the foundation
John’s younger son Tyler has also followed his father into acting.
But in recent years, another part of John’s legacy has become increasingly important to him.
At the foundation’s events, Tyler has helped his mother communicate a message that is intentionally uncomplicated: people need to know that aortic disease exists.
“We’re just ringing the alarm,” Tyler said while discussing the family’s efforts. “If we can catch it ahead of time, we can prevent it.” (New York Post)
That’s particularly important because aortic dissection symptoms can overlap with those of other medical emergencies.
The foundation warns that an EKG or chest X-ray alone cannot rule out an aortic dissection. (John Ritter Foundation)
Its educational campaign — known as the “Ritter Rules” — encourages people to understand their family history and risk factors and helps explain how aortic emergencies can be recognized and treated. (John Ritter Foundation)
There are warning signs and risk factors families can know
The condition that killed Ritter can occur unexpectedly, but certain factors are associated with increased risk.
A known thoracic aortic aneurysm is an important one.
So is a personal or family history of thoracic aortic disease.
Certain inherited conditions — including Marfan syndrome, Loeys-Dietz syndrome, vascular Ehlers-Danlos syndrome and Turner syndrome — can also increase risk. A bicuspid aortic valve is another recognized risk factor. (John Ritter Foundation)
The foundation also identifies poorly controlled high blood pressure among factors that can contribute to an aortic dissection. (John Ritter Foundation)
That’s why the Ritters have focused so heavily on family screening.
Their message isn’t that everyone needs to assume they have the disease. It’s that knowing whether a meaningful risk exists can create an opportunity to act before an emergency.
For John’s brother Tom, that opportunity mattered enormously.
John died only days before his 55th birthday
There is another detail that makes the timing of his death especially painful.
John was born on September 17, 1948.
He died September 11, 2003.
His 55th birthday was only six days away. (John Ritter Foundation)
September has therefore become an emotional month for his family.
In 2026, the John Ritter Foundation held its annual Evening From the Heart gala on September 12 — one day after the 23rd anniversary of his death.
The foundation’s Aortic Dissection Awareness Week then ran from September 13 through September 19, encompassing what would have been John’s 78th birthday. (John Ritter Foundation)
But this year’s event also became something else: a reunion of people whose lives John had touched.
Kaley Cuoco broke down remembering him
Among those attending was Kaley Cuoco.
She was only a teenager when she played John’s daughter on 8 Simple Rules, and more than two decades later, talking about him remains emotional.
At the 2026 foundation gala, Cuoco recalled how quickly Ritter had made her feel protected when she joined the show.
Then she spoke about the day he died.
Cuoco described it as “one of the worst days of my life.” (EW.com)
For weeks afterward, she said, she had to remind herself that John wasn’t actually her father.
Their time together had been relatively short, but the relationship left an enormous impression. Cuoco said she still considers Ritter a “north star” in her career. (EW.com)
Joyce DeWitt still remembers their extraordinary chemistry
John’s Three’s Company family also remains closely connected to his legacy.
Joyce DeWitt made a surprise appearance at the September gala and reflected on the almost instinctive connection she and Ritter had while performing together.
She described their relationship as a form of “kinesthetic communication” — the two actors could physically respond to one another in scenes with an unusual degree of trust and instinct. (EW.com)
It helped make Jack Tripper one of television’s most memorable comedy characters.
From 1977 until 1984, millions watched Ritter tumble over furniture, misunderstand conversations and turn ordinary situations into elaborate pieces of physical comedy.
The role earned him both an Emmy and a Golden Globe. (John Ritter Foundation)
Yet when people gathered to celebrate him 23 years after his death, they weren’t merely talking about Jack Tripper.
They were talking about the person behind him.
Jason sees more of his father in himself now
Perhaps nobody experiences John’s continuing presence quite like Jason.
As Jason has grown older, fans have increasingly remarked on how much he resembles his father.
Jason notices it too.
At 46, he says he increasingly recognizes John’s expressions and mannerisms in himself. Sometimes it happens unexpectedly during an audition: he’ll make a gesture or react in a particular way and suddenly recognize something his father used to do. (People.com)
Jason also continues discovering his father through old interviews.
That experience has changed the way he thinks about his own daughter.
One day, he knows, she may watch old clips of him and discover parts of her father she didn’t know — exactly as Jason does with John today. (People.com)
Twenty-three years later, John’s death is still saving lives
John Ritter’s death was sudden.
His family had no opportunity to prepare for it.
But what happened afterward was deliberate.
Amy created a foundation.
John’s children began getting screened.
His brother underwent testing that revealed an aneurysm.
Researchers received funding.
Families affected by aortic disease found a community.
And every September, the Ritters repeat a message they wish their own family had understood before September 11, 2003.
The John Ritter Foundation says approximately 20,000 Americans experience an aortic dissection each year. It also says that prompt diagnosis and treatment could allow nearly four out of five patients to survive. (John Ritter Foundation)
That is why, after more than two decades, Amy, Jason, Tyler and the rest of John’s family haven’t stopped talking about the condition.
They’re not trying to keep people afraid.
They’re trying to make the words “aortic dissection” familiar enough that when they matter, someone recognizes them.
As Tyler put it, they’re simply “ringing the alarm.” (New York Post)
And the family hopes that an alarm heard early enough can save a life.
For more on how celebrities are prioritizing their health, check out why fans were concerned about Lionel Richie after his recent hospital stay and see Keely Shaye Smith’s transformation as she embraces a healthier lifestyle.
