Hayden Panettiere’s poignant final act revealed just days after her sudden death at 36

Just weeks before her tragic death at the age of 36, Hayden Panettiere was using her voice to fight for a cause that had been close to her heart for almost two decades.

The Heroes and Nashville actress filmed a powerful campaign for animal rights organization PETA calling for an end to keeping dolphins in captivity, with the organization releasing the poignant footage following her death on Sunday, August 16.

Hayden’s representative confirmed her death to HELLO!, with her family remembering her as “an incredible light and a force of nature who brought immeasurable love and joy to all who knew her”. Her cause of death has not yet been determined and the investigation remains ongoing.

Now, PETA has revealed one of the actress’s final projects, describing the campaign as her “last act of kindness” and paying tribute to a woman whose commitment to protecting animals stretched back to her teenage years.

Hayden Panettiere’s final act

In the striking campaign image, Hayden squeezed herself into a small bathtub to illustrate the cramped conditions dolphins can experience when kept in captivity.

“Could you live in a bathtub?” reads the accompanying message. “Say no to marine parks. End cruel captivity.”

The accompanying video, filmed only weeks before Hayden’s death, saw the actress make an emotional appeal to viewers to consider what life in captivity could mean for marine mammals.

“Can you imagine their frustration, their trauma, their depression?” Hayden said in the video, before explaining that animals living in the wild are able to remain with their families and swim freely through their natural habitats.

PETA released the previously unseen campaign on Tuesday in tribute to Hayden and what the organization called her “legacy of compassion”.

Her message concluded with a direct plea to her fans to stop supporting facilities that keep dolphins in captivity.

“Vow today to never go to a marine park that keeps dolphins in extreme captivity,” she said. “Together, we can end this cruelty.”

Hayden Panettiere’s lifelong fight 

The campaign is particularly poignant given that Hayden had been campaigning for the protection of dolphins since she was a teenager.

In 2007, when she was just 18 and at the height of her Heroes fame, the actress travelled to Taiji, Japan, as part of a group of activists protesting the annual dolphin hunt.

Hayden and other campaigners paddled out into the water on surfboards in an attempt to reach a pod of dolphins before being confronted by local fishermen.

Her involvement in the campaign attracted worldwide attention and became part of the wider movement highlighted in the Oscar-winning documentary The Cove. PETA said her advocacy for marine mammals continued throughout her life.

Hayden later received PETA’s Compassion in Action Award for her animal advocacy, while her work also extended beyond marine life.

Following her death, the organization recalled an incident on the set of Heroes when Hayden reportedly stopped filming after seeing a crew member using a leaf blower near a flock of birds, intervening to protect them.

“The world has lost a kind soul and the animals a fierce ally,” PETA wrote in its tribute to the actress.

Hayden Panettiere’s tragic death at 36

The release of Hayden’s final campaign comes just days after news of her sudden death sent shockwaves through Hollywood.

The actress was found unresponsive in Greenville, South Carolina, on Sunday, just five days before what would have been her 37th birthday.

Hayden had recently returned to the spotlight after being candid about some of the most difficult chapters of her life, including her struggles with addiction and postpartum depression and the devastating 2023 death of her younger brother, Jansen Panettiere.

She had also released her memoir, This Is Me: A Reckoning, earlier this year, offering an intensely personal account of her experiences growing up in Hollywood and the battles she faced away from the cameras.

Hayden’s lifelong compassion for animals

Hayden’s love for animals went far beyond her headline-making mission to protect dolphins in Japan. As her fame grew through Heroes, she became increasingly determined to use her platform to speak for causes that couldn’t speak for themselves.

“The show put me in a place to speak for things that I’m passionate about,” she told Teen Vogue in 2008.

That same year, Hayden was campaigning to protect whales, with Senator Paul Strauss recalling after her death just how seriously the young actress took her activism.

“She was a really passionate advocate,” he told People. “Everybody knows the actress… but to me she was an effective advocate for the political causes she believed in.”