Zac EfronZac Efron underwent emergency surgery yesterday after complaining of severe abdominal pain.

The High School Musical star was rushed into surgery at Cedars-Sinai Medical Center yesterday morning after the pain was diagnosed as appendicitis - a condition that can be fatal if left untreated.

His spokesperson confirmed the news early yesterday afternoon (local time), explaining: “He had his appendix removed and is recuperating.”

He is expected to be back at work on the set of new film Seventeen within a few days.