The Disney Channel phenom High School Musical has spawned a quadruple-platinum soundtrack, a national tour and even plans for an ice show spinoff, so it doesn't take an honors student to figure out that a sequel was inevitable. Being back on the set "was so crazy," says Vanessa Hudgens, 18, who plays shy brainiac Gabriella. "Everything was way more chaotic because we really stepped it up." Not that the cast didn't have fun. While working on the sequel, which wrapped on April 13, they quoted lines from Anchorman, snuck out for shopping sprees and skateboarded around the set. "We love to goof off and joke around," says Zac Efron, 19, a.k.a. Gabriella's jocky sweetheart Troy. Fans will have to wait until August to catch the movie on the Disney Channel. In the meantime, PEOPLE caught up with one of Hollywood's most popular casts.

FIRST LOOK!

In the movie, Sharpay (getting an avocado facial) makes a play for Troy, much to Gabriella's chagrin. The sequel's setting is a country club, where the gang goes for the summer, some to work, some to play. Think Dirty Dancing, the next generation.

Will Troy (Efron) and Gabriella (Hudgens) kiss this time? Things seem promising from a scene where Troy gives Gabriella a "T" necklace. The crushes end off-camera, though. "We all had instant relationships like brothers and sisters," says Hudgens (right, goofing around with Efron between takes). "So we look at each other like 'Ew! No way!'"

"I don't think anyone wears this much pink," says Grabeel of his flamboyant character, Ryan, who shows a talent for baseball in the sequel. Recovering from knee surgery, Grabeel wore a brace to film some scenes. "They called me 'Gramps' on the set," he says.

Sharpay's dog Boi (played by director Kenny Ortega's pup Manly) gets some pink highlights at the spa. "He's such a good sport," says Ortega.

Taylor (Monique Coleman, left) advises Gabriella to follow her heart when it comes to Troy. Still, "the movie doesn't have too much of a romantic undertone," says Coleman. "It's about figuring out who you are."

To see more photos from the High School Musical movie set, go to PEOPLE.COM/HSMUSICAL

This week's cover

On Newsstands Now!

Saved by the Bell Reunion

The hookups, the meltdowns, the memoires

The case reveals what was really going on what they think of each other now!

Get 4 FREE PREVIEW Issues! Click here now