<Ul> <Li> Zac Efron as Troy Bolton , Gabriella 's boyfriend , the most popular male student at East High School , and the captain of the varsity basketball team . 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 : `` Start of Something New '' , `` What I 've Been Looking For ( Reprise ) '' , `` Breaking Free '' , `` We 're All in This Together '' and `` I Ca n't Take My Eyes Off of You '' . </Li> <Li> 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 . </Li> <Li> 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 . </Li> <Li> 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 . She is very mean , unlike him , but enjoys being the center of attention , particularly Troy 's and is admired by Zeke . </Li> <Li> Corbin Bleu as Chad Danforth , Troy 's friend , Taylor 's love interest , and is very good friends with Jason and Zeke . He likes the status quo but later ends up dating Decathlon captain Taylor . </Li> <Li> Monique Coleman as Taylor McKessie , Gabriella 's friend , Chad 's love interest , and is very good friends with Martha and Kelsi . 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 . </Li> <Li> Joey Miyashima as Dave Matsui , a principal at East High . He does the morning announcements every day . </Li> <Li> 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 . </Li> <Li> Olesya Rulin as Kelsi Nielsen , a friend of Gabriella and Taylor and a student at East High . 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 . </Li> <Li> Chris Warren Jr. as Zeke Baylor , a friend of Troy and Chad who plays for the basketball team . He also enjoys baking and is an admirer of Sharpay . </Li> <Li> 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. Darbus ' class . He is good friends with Troy , Chad , and Zeke . </Li> <Li> 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 . </Li> <Li> 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 . </Li> <Li> 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 . </Li> <Li> Leslie Wing Pomeroy as Lucille Bolton , Troy 's mother . She serves food for Troy at his house but is more sufficient for Troy to love her . </Li> <Li> Joyce Cohen as Ms. Falstaff , the librarian at East High
<Ul> <Li> Zac Efron as Troy Bolton , Gabriella 's boyfriend , the most popular male student at East High School , and the captain of the varsity basketball team . 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 : `` Start of Something New '' , `` What I 've Been Looking For ( Reprise ) '' , `` Breaking Free '' , `` We 're All in This Together '' and `` I Ca n't Take My Eyes Off of You '' . </Li> <Li> 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 . </Li> <Li> 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 . </Li> <Li> 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 . She is very mean , unlike him , but enjoys being the center of attention , particularly Troy 's and is admired by Zeke . </Li> <Li> Corbin Bleu as Chad Danforth , Troy 's friend , Taylor 's love interest , and is very good friends with Jason and Zeke . He likes the status quo but later ends up dating Decathlon captain Taylor . </Li> <Li> Monique Coleman as Taylor McKessie , Gabriella 's friend , Chad 's love interest , and is very good friends with Martha and Kelsi . 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 . </Li> <Li> Joey Miyashima as Dave Matsui , a principal at East High . He does the morning announcements every day . </Li> <Li> 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 . </Li> <Li> Olesya Rulin as Kelsi Nielsen , a friend of Gabriella and Taylor and a student at East High . 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 . </Li> <Li> Chris Warren Jr. as Zeke Baylor , a friend of Troy and Chad who plays for the basketball team . He also enjoys baking and is an admirer of Sharpay . </Li> <Li> 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. Darbus ' class . He is good friends with Troy , Chad , and Zeke . </Li> <Li> 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 . </Li> <Li> 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 . </Li> <Li> 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 . </Li> <Li> Leslie Wing Pomeroy as Lucille Bolton , Troy 's mother . She serves food for Troy at his house but is more sufficient for Troy to love her . </Li> <Li> Joyce Cohen as Ms. Falstaff , the librarian at East High
who sang troy bolton in high school musical
who sang troy bolton in high school musical
Drew Seeley
Drew Seeley