Hayden Panettiere Registers to Vote, Enjoys Birthday Party

Hayden Panettiere rang in her 18th birthday Tuesday in a big way … by registering to vote at the Declare Yourself offices in Beverly Hills!

Oh, and Hayden Panettiere also had a birthday party!

The actress and 75 of her close friends and family members partied at LG House in Malibu. On hand were Stephen Colletti, Rumer Willis, and Mario Lopez, plus Heroes co-stars Adrian Pasdar, Milo Ventimiglia, Greg Grunberg, Zachary Quinto - and new cast member Kristen Bell!

The food of choice Italian with pasta and Japanese with different types of sushi and rolls. A red velvet cake exclaimed “Happy Birthday, Hayden!”

We couldn’t have said it better. Happy birthday again, Hayden!