Jimmy Kimmel, the beloved host of Jimmy Kimmel Live!, took a heartfelt moment on social media to celebrate a special milestone in his family while also shining a light on the ongoing journey of his youngest son’s health. On Tuesday, April 21, 2026, Kimmel, 58, marked his son Billy’s 9th birthday with an Instagram post that blended joy, gratitude, and a powerful call to action for pediatric healthcare.

In the touching photo shared by the late-night television personality, young Billy appeared outdoors on what looked like a memorable fishing trip. Dressed in a practical rain jacket paired with a matching beanie to ward off the elements, the smiling boy proudly held up a fish he had caught, beaming with the pure excitement that only a child can display. The image captured a moment of normal childhood adventure—one that many parents cherish but that carries extra meaning for the Kimmel family given Billy’s medical history.

Kimmel’s caption was both celebratory and reflective: “Our boy Billy turns 9 today and is doing great, thanks to the doctors, nurses, therapists, and many more at @ChildrensLA & @CedarsSinai.” He continued by highlighting the important work these institutions do beyond his own family: “CHLA trains medical staff to save kids all over the world. If you can, please make a donation of $9 to support critical health care for kids – the link is in my bio – thank you. #CatchAndRelease.”

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This annual tradition of using his son’s birthday to raise awareness and funds for Children’s Hospital Los Angeles (CHLA) and Cedars-Sinai has become a meaningful ritual for Kimmel. For years, he has openly shared updates about Billy’s battle with congenital heart disease (CHD), a condition that affects the structure of the heart and is present from birth. According to the Children’s Heart Foundation, congenital heart defects occur in approximately 1 in 110 babies born in the United States. These defects can range from mild to severe and may involve missing or improperly formed parts of the heart, valves, or major blood vessels.

Billy was diagnosed with a serious form of CHD shortly after his birth in 2017. In the days following his arrival, he underwent his first open-heart surgery as a newborn—an incredibly frightening time for any parent. Over the years, Billy has required additional procedures, including a third open-heart surgery in May 2024. At that time, Kimmel shared that the surgery involved placing a new valve, and the family approached the operation with a mixture of optimism and understandable fear.

In the months and years since, Billy has continued to thrive. During a 2024 appearance on the iHeartPodcast Politickin’, Kimmel provided an encouraging update, saying his son was “doing great” after the third surgery. He noted that aside from the visible scar on his chest, one would never know what Billy had been through. “He’s a very funny kid, he’s totally fine now. Hopefully, he’ll never have to have another surgery of any kind thanks to the Children’s Hospital in L.A., which is a great hospital,” Kimmel said at the time.

The latest birthday post on April 21, 2026, reinforces that positive trajectory. Billy is described as doing exceptionally well, enjoying everyday childhood experiences like fishing trips and showing the resilience and humor that his father has often praised. Kimmel has repeatedly called Billy one of the “toughest (and funniest)” kids he knows, crediting the exceptional care from medical teams in Los Angeles for helping his son reach this point.

Beyond the medical updates, Kimmel’s posts serve a larger purpose: advocating for children facing similar health challenges. By encouraging followers to donate an amount matching Billy’s age—$9 this year—Kimmel turns personal gratitude into collective action. These funds support critical pediatric care, training for medical staff who treat children worldwide, and resources for families navigating complex health issues. It is a gesture that transforms what could be a purely private family celebration into an opportunity to give back and raise awareness about congenital heart disease and the importance of specialized children’s healthcare.

Jimmy Kimmel shares Billy and his 10-year-old sister Jane with his wife, Molly McNearney, a writer and producer who has been by his side through every step of Billy’s medical journey. Kimmel also has two adult children, Katie (33) and Kevin (31), from his previous marriage to Gina Maddy. The blended family has often come together in support of Billy, with Molly frequently highlighted by Kimmel for her extraordinary strength during hospital stays and recovery periods.

In past birthday posts, Kimmel has been candid about the emotional rollercoaster. When Billy turned 7, he underwent his third surgery, and the family emerged “with a new valve inside a happy, healthy kid.” Kimmel publicly thanked his wife for being “stronger than is reasonable for any Mom to be,” while praising Billy’s toughness and sense of humor even at a young age. These glimpses into the family’s private struggles have resonated with many parents facing their own health challenges with children, helping to reduce stigma around congenital conditions and encouraging open conversations about medical journeys.

Congenital heart disease remains one of the most common birth defects, yet advances in surgical techniques, postoperative care, and long-term management have dramatically improved outcomes. Many children like Billy go on to lead active, full lives after successful interventions. Kimmel’s consistent updates illustrate this hope—showing a boy who enjoys fishing, makes people laugh, and lives with the energy typical of any 9-year-old, all while carrying the quiet evidence of his medical history in the form of a chest scar.

As a public figure, Jimmy Kimmel has used his platform responsibly, never sensationalizing his son’s condition but instead focusing on gratitude toward healthcare providers and the need for continued support for pediatric medicine. His annual birthday appeals have likely inspired thousands of donations over the years, directly benefiting hospitals like CHLA, which not only treats local patients but also trains professionals who save lives globally.

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This year’s post, featuring Billy’s proud fishing moment, symbolizes growth, resilience, and the simple joys that every child deserves. The hashtag #CatchAndRelease adds a lighthearted touch, nodding to the ethical practice many anglers follow—catching a fish only to release it back into the water—while also serving as a gentle reminder that life’s most precious moments are often about experiences rather than possessions.

For the Kimmel family, Billy turning 9 represents another successful lap around the sun and another year of stability following multiple surgeries. It is a testament to modern medicine, dedicated healthcare workers, family support, and the strength of a little boy who has faced significant challenges with courage and humor.

Kimmel’s message remains clear and consistent: while his family is deeply grateful for the care that has kept Billy healthy and thriving, many other children still need access to the same level of specialized treatment. By donating even a small amount tied to the birthday number, supporters can help ensure that critical healthcare remains available for kids facing heart defects and other serious conditions.

As Jimmy Kimmel continues to entertain audiences nightly on Jimmy Kimmel Live!, his most important role off-camera is that of a grateful father advocating for his son and for all children in need of medical care. Billy’s 9th birthday post is more than a family celebration—it is a reminder of hope, progress in pediatric cardiology, and the power of community support in turning personal hardship into broader positive impact.

Looking ahead, the family will likely continue to monitor Billy’s health with regular check-ups, but the tone from Kimmel’s recent updates is overwhelmingly positive. Billy is not defined by his congenital heart disease; instead, he is a funny, active, and happy 9-year-old who loves outdoor adventures and brings joy to those around him.

In sharing these moments publicly, Jimmy Kimmel not only honors the medical teams who have worked tirelessly but also inspires others to appreciate the fragility and beauty of health, especially in children. His call for $9 donations on Billy’s 9th birthday is a simple yet meaningful way for fans to participate in that mission of care and compassion.

As Billy continues to grow, fish, laugh, and live life fully, his story stands as a beacon of resilience for families everywhere navigating similar paths. And for Jimmy Kimmel, every birthday milestone is both a personal victory and an opportunity to pay forward the extraordinary care his son has received.