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Hayden Panettiere's Brother's Tragic Cause of Death Revealed
17 Aug
Summary
- Jansen Panettiere died of an undiagnosed enlarged heart.
- Hayden Panettiere gained 40 pounds due to stress from grief.
- Jansen was a child actor with notable voice and film roles.

Jansen Panettiere, the younger brother of actress Hayden Panettiere, passed away unexpectedly at the age of 28. His death in February 2023 was attributed to complications from an enlarged heart and aortic valve issues, which had gone undiagnosed. This profound loss deeply affected Hayden, who revealed in a 2024 interview that the stress of losing her only sibling led to a 40-pound weight gain.
Jansen had a career as a child actor, contributing voice roles to "Blue's Clues" and "Robots," and appearing in films like "The Perfect Game." Hayden Panettiere has spoken openly about the enduring grief, describing the pain as immeasurable and feeling as though she lost half her soul. She often shares heartfelt tributes on social media, remembering Jansen's remarkable spirit and their shared childhood.