Hayden Panettiere’s brother was Jansen Panettiere, an actor five years her junior who died on February 19, 2023, at 28. The family said the cause was cardiomegaly, an enlarged heart, together with aortic valve complications.
He was her only sibling. “He was my only sibling, and it was my job to protect him,” she told People after his death, a sentence that carries more weight now that she has died too, on August 16, 2026, three years after him.
Who Was Jansen Panettiere?
Jansen Panettiere was born September 25, 1994, in Palisades, New York, and worked as an actor and writer from childhood, per his Wikipedia biography. His credits include voice work in the animated feature Robots (2005) alongside Ewan McGregor and Robin Williams, plus roles in The Fog and The Forger.
Robots and The Forger hold a particular place in the family record: they are the two productions that put both siblings onscreen together.
Both were born in Palisades, both were working actors before they were teenagers, and both were represented for years by the same parent. That shared start is part of why the protective instinct Hayden described was not an abstract one; she had watched her brother do the same job she did, from the same house, since he was small.
How Jansen Panettiere Died
He died in New York City on February 19, 2023. The family told E! News that the cause was cardiomegaly with aortic valve complications, a heart condition rather than an accident or overdose, and the medical finding was reported the following week.
Separately, and in her own words rather than a coroner’s, Panettiere later described what her brother’s final months actually looked like. In the book she published in 2026, she wrote that Jansen had been heavily abusing drugs, including crack and heroin, before he died, per USA TODAY. She also described pressing her father to get him into treatment without success.
Those two facts sit side by side in the public record. No source connects them causally, and the family’s stated cause of death remains the heart condition.
Were Hayden and Jansen Twins?
No. Hayden was born on August 21, 1989, and Jansen on September 25, 1994, both in Palisades, New York, a gap of five years and one month. The twin idea likely comes from how often the two appeared together as young actors, and from a physical resemblance that got sharper as Jansen grew up.
He was the younger sibling in every sense of the arrangement, including the protective one she described.
What His Death Did to Her
Panettiere did not hide the damage. She told People that the stress of losing him put about 40 pounds on her body, an unusually blunt disclosure from an actress whose appearance had been public property since childhood.
The loss also sat on top of an already fractured family. Panettiere was estranged from her mother, former soap actress Lesley Vogel, a rift she discussed publicly in the years after Jansen’s death. Her father, Alan Lee “Skip” Panettiere, was the one who announced her own death in August 2026, calling her “an incredible light and a force of nature.”
Her surviving family now includes her daughter Kaya, who lives in Europe with her father; that side of the story is covered in our piece on Hayden Panettiere’s daughter.
FAQ
What happened with Hayden Panettiere’s brother?
Jansen Panettiere died on February 19, 2023, at age 28. The family attributed his death to cardiomegaly, an enlarged heart, combined with aortic valve complications.
How many siblings does Hayden Panettiere have?
One. Jansen was her only sibling, which she stated directly after his death: “He was my only sibling, and it was my job to protect him.”
How old was Hayden Panettiere’s brother when he died?
Jansen Panettiere was 28. Born September 25, 1994, he died on February 19, 2023, roughly seven months before his 29th birthday.
What movies was Jansen Panettiere in?
His credits include Robots (2005), The Fog, and The Forger. The first and last of those are the two projects in which he and his sister both appeared.
