Zac Efron pranked everyone on set

Zac - who played basketball team captain Troy Bolton - was the biggest prankster on set.

He would often keep “everyone on their toes” by throwing water balloons at his co-stars and putting caution tape over their trailers.

They eventually got him back whilst making the third film by covering his trailer with toilet paper, attacking him with water guns and dumping a bucket of water on him.