Hayden Lesley Panettiere spent nearly her entire life in front of an audience. Born August 21, 1989, in Palisades, New York, she began appearing in commercials when she was only 11 months old. By four, she was working in daytime television, first as Sarah Roberts on One Life to Live and later as Lizzie Spaulding on Guiding Light. Her childhood was therefore unusual even by the standards of young performers: acting was not something she discovered as a teenager or young adult, but a profession she had known almost from the beginning of her life.
Her work soon expanded beyond soap operas. She supplied the voice of Dot in Pixar's A Bug's Life and appeared in films including Remember the Titans, in which she played Sheryl Yoast, the football-loving daughter of coach Bill Yoast. Through the early 2000s she moved steadily between television and film, with appearances in Ally McBeal, Raising Helen, Tiger Cruise, Racing Stripes, Ice Princess and Bring It On: All or Nothing.
Her defining breakthrough arrived in 2006 with NBC's Heroes. Panettiere was 17 when audiences met Claire Bennet, a high-school cheerleader with the ability to regenerate from seemingly fatal injuries. Claire became central to the series and to one of the most recognizable television catchphrases of the era: "Save the cheerleader, save the world." The success of Heroes transformed Panettiere from an accomplished child actor into an internationally recognizable star.
After Heroes ended, Panettiere continued moving between film and television. In 2011 she joined Wes Craven's Scream 4 as horror-film enthusiast Kirby Reed, a character whose wit and resilience made her a fan favorite and eventually led to Panettiere's return to the franchise more than a decade later in Scream VI.
Another major chapter began in 2012 when she was cast as ambitious country singer Juliette Barnes opposite Connie Britton in Nashville. Panettiere performed many of her own songs while giving Juliette a volatile mixture of confidence, vulnerability, ambition and emotional instability. The performance brought her Golden Globe nominations in both 2013 and 2014.
Away from acting, Panettiere had a longstanding commitment to animal welfare, particularly the protection of whales and dolphins. As a spokesperson for the Whaleman Foundation's "Save the Whales Again!" campaign, she traveled to Japan in 2007 and joined other activists who paddled into the waters at Taiji to protest the killing of dolphins. The confrontation was captured as part of the material surrounding The Cove, the documentary that later won the Academy Award for Best Documentary Feature. She returned to Japan to continue advocating against the hunts.
Her personal life increasingly intersected with another part of the world after she began a relationship with Ukrainian heavyweight boxing champion Wladimir Klitschko. The couple became engaged and welcomed their daughter, Kaya Evdokia Klitschko, in December 2014. Their relationship ended in 2018, but Panettiere remained deeply connected to her daughter and to Ukraine. Following Russia's full-scale invasion in 2022, she created Hoplon International to channel aid, including medical and protective supplies, to people in Ukraine.
Motherhood also began one of the most difficult periods of Panettiere's life. Following Kaya's birth, she experienced severe postpartum depression and eventually sought professional treatment. Rather than conceal the illness, Panettiere spoke publicly about it at a time when postpartum mental health was still frequently misunderstood. She explained that her experience did not fit the narrow assumptions many people had about postpartum depression and repeatedly encouraged women to seek help.
Panettiere later disclosed that depression became intertwined with alcohol and drug addiction. The situation was particularly painful while she was working on Nashville, because storylines involving Juliette Barnes increasingly paralleled problems Panettiere was experiencing in her own life. She later said she sometimes struggled to distinguish where Juliette ended and Hayden began.
After Nashville concluded in 2018, Panettiere largely stepped away from acting while addressing her health and addiction. She eventually underwent extensive treatment and trauma therapy. Her return to the screen came with Scream VI in 2023, reprising Kirby Reed 12 years after Scream 4.
That comeback followed another devastating event. In February 2023, her younger brother, actor and artist Jansen Panettiere, died at 28 from complications related to an enlarged heart. His death profoundly affected her.
In the final year of her life, Panettiere increasingly sought to tell her story in her own words. She starred in and produced the 2026 psychological thriller Sleepwalker and published the memoir This Is Me: A Reckoning in May 2026. The book examined child stardom, fame, motherhood, addiction, relationships, loss and recovery with unusual candor. It became a New York Times and USA Today bestseller.