Began her acting career at 11 months when she appeared in a commercial for Playskool

Has appeared in over 50 commercials

Childstarlets.com's Actress of the Year, 2000

Parents are Lesley and Skip Panettiere

She takes karate and boxing lessons

Soap Opera Magazine's star of the week, 7/21/98 issue

Appeared on the Jay Leno show on December 30, 1998

In "The Guiding Light" (1952), for Hayden's character Lizzie's battle with leukemia, the show received a Special Recognition Award from The Leukemia and Lymphoma Society for bringing national awareness of the disease to the attention of daytime viewers.

As Lizzie Spaulding on "The Guiding Light" (1952), Hayden had to deal with difficult story lines in which she shot and killed her mother's abuser, been kidnapped, gone through both of her parents remarrying, and just recently battled leukemia.

Was nominated for a Grammy for Best Spoken Word Album for Children for A Bug's Life Read-Along [2000]

Hobbies include singing, dancing, horseback riding, gymnastics, taking piano lessons, and swimming.

Her last name was printed wrong in an issue of the "Discovery Girls" magazine where she was considered an "Exceptional Tween."

Her mother used to be an actress.

Was originally cast to play Sarah Altman in Panic Room (2002) but was later replaced by Kristen Stewart.

Older sister of Jansen Panettiere.

She has known Spencer Breslin and Abigail Breslin (her Raising Helen (2004) co-stars) before they could talk.