For years, the cheerleader, girlfriend, and comeback kid versions of Hayden Panettiere’s story were favored by the entertainment media. She moved through Hollywood in a way that gave the impression that resilience came naturally to her because she was small and had bright eyes. It didn’t. And when her brother Jansen passed away in February 2023 at the age of just 28, her body reacted in a way that no diet plan, no trainer, and no amount of willpower could stop.
Forty pounds. In the weeks and months after Jansen’s passing, Panettiere put on that much weight. In September 2024, she said, “I just ballooned out,” to People magazine. “It didn’t matter what I did, what I ate.” She wasn’t exactly falling into bad habits, at least not in the way that people think when they hear that a famous person has rapidly put on weight. She was in mourning. It turns out that the human body has a very physical address for grief.
It includes cortisol, the stress hormone that floods your system during prolonged emotional trauma, causing you to retain fat, interfere with sleep, and slow your metabolism in ways that seem almost intentional. In her own words, Panettiere expressed her belief that her body was “protecting itself, shielding itself from the world.” That framing is important. She wasn’t talking about failure. She was talking about how to survive.
Jansen, an actor as well, passed away from cardiomegaly, an enlarged heart made worse by problems with the aortic valve. Over the weekend of President’s Day, he was discovered unconscious in New York. For Hayden, who referred to him as her only sibling and stated that she felt it was her duty to keep him safe, the loss opened a gap that would not go away. “When I lost him, I felt like I lost half of my soul,” she stated. “I will never get over his loss.” Most public figures would have sanitized that statement’s honesty. She didn’t.
The public manner in which the weight gain was observed added to its complexity. At Jansen’s funeral, she was photographed by paparazzi in what she called a private setting. After giving birth to her daughter Kaya in 2014 and returning to the Nashville set three months postpartum, she first suffered from agoraphobia years prior. Seeing those pictures of herself—altered, swollen with grief, and taken without permission at the darkest point of her life—triggered another episode of agoraphobia. “No woman should have to be on camera unless they want to be three months after they give birth,” she said at the time. For more than ten years, she had been engaged in that specific struggle with her self-image.
Jansen’s death was followed by a methodical, gradual return. She started going for long walks with famous trainer Marnie Alton. She claimed that these walks served as therapy sessions, allowing her to talk while moving and letting go of things that had been too heavy for her to handle on her own. It was more than just the endorphins. “It allowed me to release the stress, the high expectations I’d always put on myself,” she stated. It’s possible that the work she’d done in therapy, including nearly eight months of intensive rehab for alcohol and opioid addiction in 2020, gave her a vocabulary for understanding what her body was doing rather than just punishing herself for it. This kind of self-awareness is difficult to achieve.
The past of Panettiere’s body was never clear-cut. She started drinking excessively when she was under a lot of personal and professional pressure, and after suffering a neck injury, she added opioids. “My tolerance got so high so fast that it became a problem,” she said in an interview with Women’s Health. Every change in her body, including the weight gain associated with addiction, the weight loss associated with recovery, and the weight gain associated with grief, was a record of what she was going through at the moment. Once she gave it her own name, it’s difficult not to see it that way.
On August 16, 2026, she passed away at the age of 36 from what appeared to be an overdose. Only a few months prior, her memoir, This Is Me: A Reckoning, had made it to the New York Times bestseller list. By most accounts, she had been working, sober, and making progress. People felt less alone in their own bodies and their own losses when she spoke candidly about the weight she carried, both literally and figuratively. At least that aspect of her seems certain to endure.
FAQs
Q1. How much weight did Hayden Panettiere gain after her brother’s death?
She gained 40 pounds rapidly following Jansen’s death in 2023.
Q2. What caused Hayden Panettiere’s sudden weight gain?
Grief-driven cortisol and stress caused her body to retain weight uncontrollably.
Q3. How did Hayden Panettiere lose the weight she gained?
Long therapeutic walks with trainer Marnie Alton helped her recover gradually.
Q4. Did Hayden Panettiere’s weight gain affect her mental health?
Yes, it triggered a severe return of her pre-existing agoraphobia.
Q5. When did Hayden Panettiere first struggle with body image?
After returning to Nashville to film just three months after giving birth.
