Grabeel claimed that Tisdale, in a Sharpay-like manner, gave him unsolicited direction in the audition.
It was rumored that the two actors did not get along in the first film. In its first week of release, the soundtrack to High School Musical debuted at #143 on the Billboard Top 200 and sold 6,500 copies.
Zac Efron's singing voice was that of Drew Seeley, who tested for the role of Troy.
Seeley sang the entirety of "Get'cha Head in the Game" and the reprise of "What I've Been Looking For." Efron only sings the first four lines of "Start of Something New," the first sentence of "Breaking Free," and during the scene on the balcony.
The reason for this is because Efron's natural voice was too low for that of a tenor and the producers wanted a tenor to match the role.
Efron did, however, do all of his own singing in the sequels, as all the music in those films had been tailored specifically for his voice.
In Corbin Bleu's first appearance at the school, he was wearing three different watches.
She has since switched back to natural brunnette leaving the Sharpay image behind her for good. In the two weeks following the first presentation of this movie on the Disney Channel, at least 8 tracks from the movie appeared on the Billboard Hot 100, the most simultaneous songs ever from one album at that point in time.
However, Zac Efron was busy promoting his film Dirty Grandpa (2016) and was unable to attend.
His only appearance was a prerecorded message in which he stated which scene from the franchise was his favorite (the scene was "We're All In This Together").
She feared she wouldn't get the role because of her hair.
Coleman claimed it resembled Corbin Bleu's hair; she thought they looked too much like siblings.