The cast of High School Musical 3: Senior Year participates in the start-of-production press conference at East High School in Salt Lake City, Utah on Friday.

Who showed up? Director Kenny Ortega, Zac Efron, Vanessa Hudgens, Ashley Tisdale, Monique Coleman and Corbin Bleu.

Principal photography will kick off tomorrow, May 3. The all-new HSM3 feature film will be shot on location in Salt Lake City, Utah, and is set for release in theaters October 24, 2008. High School Musical 3: Senior Year finds high school seniors Troy and Gabriella facing the prospect of separation as they head off to different colleges. Joined by the rest of the Wildcats, they stage an elaborate spring musical reflecting their experiences, hopes and fears about the future. With incredible new music and exciting dance numbers designed to take maximum advantage of the big screen, this motion picture extravaganza delivers plenty of high-energy entertainment from East High’s talented ensemble.