At the party, the two are called upon to sing karaoke together "Start of Something New". They find that they have a connection and decide to exchange numbers before going their separate ways. On the first day back at school after Christmas break, Troy sees Gabriella in his classroom and she explains that she just moved to Albuquerque, New Mexico , and transferred to East High School over the break.
Troy then shows Gabriella around the school. Wanting to eliminate competition, Sharpay investigates the new girl and has the scholastic decathlon captain and Chem Club president, Taylor McKessie Monique Coleman , find out about Gabriella's past academic achievements, which results in her and Gabriella becoming great friends. During basketball practice, Troy has trouble focusing because his thoughts are on Gabriella and the idea that he might enjoy singing in addition to basketball "Get'cha Head in the Game".
When Gabriella finally gains the confidence to step forward once the auditions are unofficially "over", Troy offers to sing with her, but drama teacher Ms Darbus Alyson Reed tells them that they are too late and leaves. Kelsi Nielsen Olesya Rulin , the musical's composer , trips and drops her music all over the stage. Ms Darbus overhears them and gives them a callback audition.
When the callback list is posted, Sharpay discovers that she has competition for the lead in the musical, and the rest of the Wildcats are shocked that Troy has auditioned. Since Gabriella has agreed to join the scholastic decathlon team, both Taylor and Chad want their teammates to focus on their upcoming competitions rather than the musical. In the locker room, Troy is tricked by his teammates into saying that Gabriella is not important while she watches through a video conference that the scholastic decathlon team had set up through a hidden webcam in cahoots with the basketballers.
Gabriella gets extremely upset by his betrayal "When There Was Me and You" and decides not to audition for the musical. Troy is left confused as to why Gabriella did not want to audition anymore and is unable to concentrate on the game. Gabriella is also seen to be in low spirits. Realizing their mistake, Chad and the basketball team tell Troy what happened and offer to support him in callbacks.
Troy goes to Gabriella's house and they reconcile. After overhearing Gabriella and Troy practising, Sharpay has Ms Darbus change the callback time to coincide with both the basketball championship and the scholastic decathlon to interfere with Gabriella and Troy's participation. Kelsi overhears the conversation and the basketball team and the decathlon team work together to come up with a plan. On the day of the competitions, Taylor and Gabriella use the school's computers to delay the championship game and the decathlon, by messing with the power in the gym and causing a chemical reaction that forces an evacuation.
Troy and Gabriella rush to the auditorium while Sharpay and Ryan finish performing their callback song "Bop to the Top" , confident that their plan worked. Both teams win their respective competitions and the entire school gathers in the gym to celebrate "We're All In This Together".
Chad asks Taylor out, and Sharpay makes peace with Gabriella. Zeke smiles in victory. On New Year's Eve, after singing with Gabriella, he finds himself developing a crush on her. Drew Seeley provides the singing voice of Troy Bolton, but Efron sings very briefly in five songs: Vanessa Hudgens as Gabriella Montez, Troy's girlfriend, a new student and one of the brainiacs on the scholastic decathlon team. She develops a love for Troy after meeting him at a New Year's party. Lucas Grabeel as Ryan Evans, Sharpay's twin brother.
He is very easily pushed around by his sister but is not as mean as her, despite going along with her plans to sabotage Troy and Gabriella. He is also shown to not be particularly smart, such as not knowing how to spell "drama", never understanding Sharpay's plans and is admired by Kelsi. Ashley Tisdale , as Sharpay Evans, Ryan's twin sister and an energetic and proud student with a love of theatre.
She is very easily pushed around by her brother and is mean, unlike him, but enjoys being the center of attention, particularly Troy's and is admired by Zeke.
He likes the status quo but later ends up dating Decathlon captain Taylor. She is captain of the school's scholastic decathlon team, and despises the basketball players and cheerleaders, believing them to be airheads, although she later ends up going out with Chad.
He does the morning announcements every day. Bart Johnson as Jack Bolton, Troy's father and the coach of the basketball team. He has a mutual dislike with Ms. Darbus, thinks that theater is worthless, and also believes that Gabriella is a distraction to Troy's basketball career. However, he eventually comes around to it. She is a pianist and composer.
She is very shy and is constantly bossed around by Sharpay, but in the end, she learns to stand up for herself and not get bossed around by Sharpay. She also enjoys composing and is an admirer of Ryan. He also enjoys baking and is an admirer of Sharpay. Ryne Sanborn as Jason Cross, Martha's love interest, one of the jocks on the scholastic decathlon team and plays for the basketball team.
He also tends to ask mundane questions in Ms. He is good friends with Troy, Chad, and Zeke. Kaycee Stroh as Martha Cox, Jason's love interest and a peppy brainiac who enjoys hip-hop. She is good friends with Gabriella, Taylor, and Kelsi. Alyson Reed as Ms. Darbus, the stern drama teacher at East High. She despises sports and cell phones but takes her job very seriously, though she can be overdramatic. She clashes frequently with Jack Bolton.
Socorro Herrera as Lisa Montez, Gabriella's mother. Her job has caused her to be transferred frequently from city to city, but she has been guaranteed that she and Gabriella will be able to stay in Albuquerque until Gabriella graduates from high school. She serves food for Troy at his house but is more sufficient for Troy to love her. Joyce Cohen as Ms. Falstaff, the librarian at East High. She keeps Chad quiet in the library and gets a book for Gabriella and Sharpay to read but takes her work very carefully.
Dutch Whitlock as Ripper, one of the dudes and dudettes on the scholastic decathlon team. Ryan Templeman as Mongo, one of the dudes and dudettes on the scholastic decathlon team. Gabriella tells her that the equation has to be 16 over pi. Anne Kathryn Parma as Susan, a girl who auditions for the winter musicale but did not get the role even though Ms.
Darbus was impressed with some hand gestures she made. She is the first singer in the auditorium. Nick Whitaker as Alan, a boy who auditions for the winter musicale but did not get the role. He is the second singer in the auditorium. Falcon Grace as Cyndra, a girl who auditions for the winter musicale and is not happy when she does not get the role.
She is the fourth singer in the auditorium. Sami Roe as a weird kid. Melissa Hildebrant as another weird kid. Aezer as a girl. Amanda Garrett as another girl. Charles Klapow as a Basketball Player. Carlton Bluford as another Basketball Player. Sabra Johnson as a Skaterdude Dancer. Shawn Carter as another Skaterdude Dancer.
Malinda Money as another Skaterdude Dancer. Bayli Baker as a Cheerleader Dancer. Allison Holker as another Cheerleader Dancer. Britt Stewart as another Cheerleader Dancer. Kelli Baker as another Cheerleader Dancer. Thayne Jasperson as a Brainiac Dancer. Mollee Gray as another Brainiac Dancer. High School Musical soundtrack The soundtrack was released on January 10, , and debuted at number on the Billboard , selling 7, copies in its first week.
In the album's third week, for the chart dated February 11, , it climbed to number ten, and has since risen to number one on the Billboard twice on March 1 and 22 and had shipped 3. Out of those copies, more than 3 million copies have been sold by August ; it was certified quadruple platinum by the RIAA.