Hayden Panettiere child stardom was not a phase she entered but the only condition she ever knew. She was eight months old when she started working, cast in a Playskool toy train commercial, and she never stopped. She died this week at 36 — an ending that feels sickeningly familiar without being any less devastating.

Her memoir, “This Is Me: A Reckoning,” arrived just three months before her death. In it she wrote that she had lost the chance at a normal childhood, meaning friends, relationships and privacy. Rather than resist that, she described leaning into the talent she felt somehow blessed with.

The Machinery Around a Small Child

Her mother, Lesley Vogel, a former soap opera actress, drove the career from the beginning. Panettiere modelled as an infant and was auditioning nearly as soon as she could walk. Her father, retired firefighter Alan “Skip” Panettiere, kept his distance from that side of her life.

At five she joined the cast of “One Life to Live.” Four years later came a prominent role on “Guiding Light.”

The storylines she was handed were extreme by any standard. Her character was kidnapped, killed another character and survived leukaemia — material she later said was not good for a developing brain.

What she took from it went deeper than stress. She wrote that she began, without realising, to associate catastrophe with adoration. People loved her when terrible make-believe things happened to her.

That single sentence explains a great deal about what followed.

When Family Becomes Business

Real difficulties accumulated alongside the fictional ones. Her parents separated when she was 18, and her mother continued to serve as her manager, erasing whatever line remained between family and employment.

Speaking earlier this year on Jay Shetty’s “On Purpose” podcast, Panettiere said everything was business. She had become the confidant, the assistant, the therapist and the shoulder to cry on — everything except her mother’s child.

Asked whether the two still spoke, she said no. There was no relationship between them, she said, sadly.

The Peak, and What Came With It

At 17 she landed the role that made her a household name: Claire Bennet on NBC’s “Heroes,” a series about ordinary people discovering extraordinary abilities. Her character was an indestructible cheerleader, and the show’s tagline — save the cheerleader, save the world — placed her at its centre.

Critics praised the series, and many viewers described her as its emotional core.

The success brought tabloid attention that fixed on her appearance and her romantic life. On screen she played someone who could not be hurt. Off screen, she has said, the pressure left her fragile.

She also appeared in the “Scream” franchise and a run of teen films, building a body of work that spanned genres.

Where the Substance Use Began

In 2022 she told People that at 15, someone on her team started offering her what were described as happy pills before red carpets — intended, she said, to make her seem lively during interviews.

She had no idea what door that would open regarding her addiction, she said.

As she got older, alcohol and drugs became something she felt she could not live without.

Motherhood and Its Aftermath

Panettiere said she stayed sober throughout her pregnancy with her daughter Kaya, born in 2014. Postpartum depression pulled her back.

The timing was cruel in an additional way. She was then starring in “Nashville,” playing a struggling country singer, and the show ran storylines involving alcoholism and postpartum depression. She said that did not help.

Her relationship with Kaya’s father, boxer Wladimir Klitschko, suffered. He did not want to be around her, she said, and she did not want to be around herself either. She described doing anything that might produce momentary happiness, then feeling worse than before — a cycle of self-destruction.

In 2018 she sent her daughter to live with Klitschko in Ukraine. She called it the hardest thing she ever had to do, explaining that she wanted to be a good mother, and that sometimes being one means letting go.

Klitschko posted a statement on X on Tuesday saying the family was experiencing profound shock and grief. He said she had built an incredible career through immense talent while also confronting the darker sides of a very demanding industry, and that young, talented people like Hayden should not leave the world so soon.

She Believed She Had Turned a Corner

During her recent book tour, Panettiere spoke about her life with real optimism.

She told Shetty she finally felt she had shaken off the darkness and negativity — that one door had closed and another was opening, that she could feel the possibilities, and that she had a lot more life to live.

On Sunday, emergency responders were called to a residence in South Carolina after a 911 report of a cardiac arrest, according to the Greenville County Coroner’s Office. She was pronounced dead about half an hour later.

A Pattern Nobody Wants to Keep Seeing

Her death arrived with grim recognition, following those of other millennial former child performers — Daveigh Chase of “The Ring,” dead at 35, and Michelle Trachtenberg of “Buffy the Vampire Slayer,” dead last year at 39. Trachtenberg had appeared alongside Panettiere in the 2005 Disney film “Ice Princess.”

The specifics differ in each case. What lingers is the shape they share: children placed inside an industry built for adults, then held responsible for surviving it.

If you or someone you know is struggling with addiction or mental health, support is available and I’m happy to help find resources.