AUBURN – Community Little Theatre’s “High School Musical” is as popular as the senior class president or the football star.

Every one of the shows, from July 25-29, have sold out. Tickets were gone a week before the musical began, which made history for the theater.

“It’s unbelievable,” said theater spokeswoman Rachel Morin. “We have never sold out a week before in our 67 years of performances.”

The show is the Maine premiere of Disney’s “High School Musical.” CLT’s performances feature Maine high school students on stage singing the songs from the Disney soundtrack, plus two new numbers.

Morin offered two reasons why the show’s such a hit.

The young, from tweens to 20, love the show.

It’s a story about basketball jock Troy and the beautiful-and-brainy Gabriella, and their fight to break down the shackles of their high school cliques. Gabriella is being played by Katherine Demarest; Troy by Colin Whiteman.

Since the musical premiered on the Disney Channel in January 2006, the soundtrack was the top-selling album last year with 3.7 million copies purchased. More than 7.5 million DVDs of the movie have sold, according to Disney. Disney is even creating a “High School Musical” ice show.

“It’s a phenomenon,” Morin said. She has friends who are teachers and they tell her students from as young as fourth- and fifth-graders have all the musical’s bags, binders and shirts.

And the Auburn show has more than the usual out-of-town patronage. The show has 35 high school students performing. They come from not only Lewiston-Auburn but the region – Gray, Lisbon, Cape Elizabeth, Raymond, Farmingdale and Rumford.

Each high school performer comes with parents, grandparents, relatives and friends who want to see the show, Morin said.

The theater is getting calls from people looking for tickets, “hoping someone is a no-show or can’t make it.” Then there’s that natural reaction people have when they hear it’s a sell-out: they want tickets even more.

CLT cannot schedule more shows, Morin said, because there’s no time and space available; other events are already booked. The show is directed by Dick Martin.