Of course you do–Heroes star Hayden Panettiere, who just turned 18, is the new face of America’s iconic “Got Milk” campaign targeting teenagers to drink milk.

For her ad, Hayden is sporting the famous milk moustache in a skintight red dress as she clutches an exploding glass of the white stuff.

“You don’t have to be a hero to feel invincible. That’s why I drink milk,” she says in the tag line, which, of course, is a reference to Hayden’s character on Heroes, Claire Bennett, who can spontaneously heal herself from almost any injury.

The sexy blonde, who turned 18 on Tuesday (August 21), will appear in new print ads, shot by celebrity photographer Annie Leibovitz. The campaign urges teenagers to drink three glasses of low-fat or fat-free milk a day.

Meanwhile, earlier this week, Hayden made an appearance David Letterman and talked about what turning legal means to her.

“I don’t think much changes when you’re 18 – maybe the way people treat you,” Hayden said.

“But I think the only things I can do is buy cigarettes, porn and, if I get in trouble with the law, I’m kind of screwed.”