Look for attendance in middle schools across the country to mysteriously drop when High School Musical 3 premieres on October 24.

In the meantime, anxious fans of the Disney franchise will be treated to that movie's trailer, beginning this Sunday night, July 13.

"We're paying homage to the fans by debuting our first look on the very network that launched the franchise, Disney President Mark Zoradi of the decision to premiere the High School Musical 3: Senior Year trailer at 7:55 p.m. Sunday.

"High School Musical is a worldwide phenomenon and as such, it is important to pursue a nearly simultaneous launch of the first look to fans everywhere, employing our online venue, Disney.com, as well as our international Disney Channels and Jetix platforms."