Though fame is "exciting," says Hudgens (in Malibu on Feb. 10), "it's hard to keep a personal life. I am a teenager. Part of me just wants to be normal." Photo by: Clark Samuels / Startraks
High School Sweethearts| High School Musical, Vanessa Hudgens, Zac Efron
At the center of it all, Efron and Hudgens have kept their romance scrupulously low-profile. On the HSM2 set, "if you didn't know they were dating, you wouldn't know they were dating," says a production source. "They're really good at not being obvious." They became more open as news of their relationship gradually leaked out: Witness his megawatt smile and thank-you kiss for Hudgens when she brought him a plate of food at a recent photo shoot. And why hide? "Two people fell in love," says costar Monique Coleman. "Who cares? We're good kids."

Like teen idols from a gentler era, Efron and Hudgens get spotted out buying Pinkberry frozen yogurt, not stumbling out of nightclubs. They hit the gym together and join fellow cast members for movie nights. Bart Johnson, who plays Efron's HSM father, recalls seeing the two at play in Toluca Lake, Calif., where Efron has his own apartment near his family's home (Hudgens lives with her parents in L.A.): "Vanessa had a scooter and she'd pull Zac around on his skateboard with a rope. He'd surf behind her all the way around Toluca Lake."

So why keep the romance so quiet? "First of all, they are so young, still teenagers," says the HSM source. "But it's also the classic teen-idol thing. It kills the fantasy when a teenage girl knows her idol has a girlfriend. But ironically the fans seem to be accepting their relationship, I think because it goes along with the storyline in the movie." Still, Hudgens and Efron maintain a "no comment" policy on the friendship rings each wears. And they were careful to arrive separately to the premiere of Efron's movie Hairspray in L.A. on July 10.