Like their symbol, the lion, Leos are fierce, strong, and adore being the center of attention. Just ask Hayden Panettiere (born August 1), who began modeling at the tender age of five months and has been in the spotlight ever since. Although she is only turning 19, Hayden already accomplished more than many people twice her age. She’s proven herself as an actress on the hit TV show Heroes, and will showcase her singing talents on her debut record later this summer. Leos are also known for their extremely caring and generous nature, and Hayden is no exception. She devotes her free time to supporting animal rights causes, and donates money to The Whaleman Foundation by selling red carpet outfits and costumes from Heroes on her personal website. As Hayden's fame continues to rise, there's no doubt she will use her star power for good causes.—Liza Darwin