Jason Cross je členem univerzitního basketbalového týmu kluků z East High School a jedním z dobrých přátel Troye Boltona, Chada Danfortha a Zekea Baylora v muzikálu High School Musical. Má tendenci klást otázky nebo pronášet prohlášení, která z něj dělají vlezdoprdelku nebo neinteligentního. V muzikálu High School Musical 2 pracuje jako poslíček autobusu v country klubu Lava Springs. Ačkoli muzikál High School Musical a muzikál High School Musical 2 naznačují možný vztah mezi Jasonem a Kelsi Nielsenovou, ve třetím filmu se účastní plesu s Marthou Coxovou. Ve filmech o muzikálu High School Musical ho hraje Ryne Sanborn. V Sharpay’s Fabulous Adventure se neobjevil.
HSM2: Thomas Fulton • Lucille Bolton • Vance Evans • Darby Evans • Boi • The Sharpettes
HSM3: Tiara Gold • Jimmy Zara • Donnie Dion • Charlie Danforth • Mrs. Danforth • Principal Matsui
SFA: Peyton Leverett • Roger Elliston • Tiffani Destin • Amber Lee Adams • Gill Samms • Neal Roberts • Berry Taylor • Mr. Gonzales • Mrs. Gonzalez
HSMTS: Nini Salazar-Roberts • Ricky Bowen • E.J. Caswell • Gina Porter • Big Red • Ashlyn Caswell • Kourtney Greene • Carlos Rodriguez • Seb Matthew-Smith • Miss Jenn • Mr. Mazzara • Natalie Bagley • Mike Bowen • Carol Salazar-Roberts • Dana Salazar-Roberts • Lily • Howie
HSM2: Kolik je hodin? • Báječné • Work This Out • You Are The Music in Me + (Reprise) • Humuhumunukunukuapua’a • I Don’t Dance • Gotta Go My Own Way • Bet On It • Everyday • All for One
HSM3: Now or Never • Right Here, Right Now • I Want It All • Can I Have This Dance • A Night to Remember • Just Wanna Be with You • The Boys are Back • Walk Away • Scream • Senior Year Spring Musical • High School Musical • Just Getting Started
SFA: Gonna Shine • My Boi and Me + (My Girl and Me) • Walking on Sunshine • Baby • New York’s Best Kept Secret • The Rest of My Life
HSMTMTS (1. řada): I Think I Kinda, You Know • Wondering • A Billion Sorrys • All I Want • Born to Be Brave • Truth, Justice and Songs in Our Key • Out of the Old • Role of a Lifetime • Just for a Moment • The Medley, The Mash-Up
HSMTM (sváteční speciál): This Christmas (Hang all the Mistletoe) • The Perfect Gift • Feliz Navidad • Hanukkah Medley • Last Christmas • White Christmas • Little Saint Nick • Believe • What Are You Doin’ on New Year’s Eve? • River • Something in the Air • That’s Christmas to Me • Christmas (Baby Please Come Home)
HSMTS (2. řada): Something in the Air • The Perfect Gift • High School Musical 2 Medley • Belle • 1-2-3 • YAC Alma Mater • Beauty and the Beast • Even When/The Best Part • Red Means Love • Granted • A Dancer’s Heart • The Climb • Home • The Rose Song • Around You • The Mob Song • Gaston • If I Can’t Love Her • Let You Go • You Ain’t Seen Nothin’ • In a Heartbeat