NEW YORK — Actress Hayden Panettiere, whose career spanned more than three decades from child commercials to leading roles on network television, died Sunday at age 36, her representative confirmed to ABC News. A cause of death was not immediately released, and her publicist, Kasey Kitchen, said an investigation into the circumstances remained ongoing. As tributes poured in across social media and entertainment outlets, here are 10 things to remember about the actress and the life she lived on and off screen.

1. She began working before she could walk. According to her Television Academy biography, Panettiere started appearing in television commercials at just 11 months old. By age 4, she had already joined the casts of daytime soap operas "One Life to Live" and "Guiding Light," an early start that placed her among the industry's most seasoned child performers by the time most of her peers were still in elementary school.

2. Her voice reached audiences before her face did. Long before she became a household name, Panettiere lent her voice to the 1998 Pixar animated film "A Bug's Life." She also appeared in the football drama "Remember the Titans" alongside Denzel Washington, one of several early film credits that helped establish her as a working child actor in Hollywood.

3. "Heroes" made her a global star. In 2006, Panettiere was cast as Claire Bennet, an indestructible cheerleader with the ability to........

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