Let's make this birthday one to remember.

34 years old (Born on August 21, 1989)

Actress, singer; She is famous from Claire Bennett on 'Heroes'.

2000: Childstarlets.com's Actress of the Year. Has two dogs, named Penny Lane and Madison. 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. She takes karate and boxing lessons. Parents are Lesley R. Vogel, a former soap opera actress, and Alan L. "Skip" Panettiere, a fire department lieutenant. Coincidentally, her first rescue on "Heroes" (2006/II) was from a train wreck fire.

Has appeared in over 50 commercials.

In 2007, Forbes Magazine estimated her earnings for the year at $2 million.

Her mother used to be a soap opera actress.

7/21/98: Soap Opera Magazine's star of the week.

Is best friends with Daniella Morris.

Is vegan and a supporter of ALF (Animal Liberation Front).

Older sister of Jansen Panettiere.

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

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

Her last name is pronounced "Pan-Uh-Tee-Air-Ee"; the Italian translation is "Baker".

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

2000: Was nominated for a Grammy for Best Spoken Word Album for Children for A Bug's Life (1998) Read-Along.

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.

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

Girlfriend of Milo Ventimiglia.

Has a partnership with United States Postal Inspection Service and the National Center For Missing And Exploited Children in a campaign against online predators, called 2 SMRT 4U.

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

Appeared on "The Tonight Show with Jay Leno" (1992) on December 30, 1998.