Zac Efron, the High School Musical heartthrob underwent emergency surgery Tuesday to remove his appendix.The 20-year-old actor had the operation at Cedars-Sinai Medical Center in Los Angeles, his publicist Gina Hoffman said.

photo provided by PR Photos

Efron became a teen heartthrob with his starring role as Troy Bolton in the hit Disney Channel TV movie “High School Musical” and its sequel. He also starred in the film “Hairspray.”

He was hospitalized a day after Walt Disney Studios Motion Picture Productions announced that he and his five “High School Musical” co-stars had signed on to appear in the theatrical film “High School Musical 3: Senior Year.”

Efron, Vanessa Hudgens, Ashley Tisdale, Lucas Grabeel, Corbin Bleu and Monique Coleman will star as high-school seniors staging an elaborate musical before they graduate, the studio said.

Filming was scheduled to start in the spring, the studio said.

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