Rollista

• Jonah Hill — Sherman Schrader
• Artie Baxter — Mike Chambers
• Kellan Lutz — Dwayne
• Chantelle Tibbs — Confused Kid
• Skyler Stone — S. H. Student in Hallway
• Jim O'Heir — Mr. Schrader
• Darcy Shean — Mrs. Schrader
• Steve Little — Desk Clerk
• Scott Adsit — Drop-off Dad
• Brendan Miller — Wayne
• Matthew Alexis Busek — Fake ID Kid
• Justin Long — Bartleby Gaines
• Blake Lively — Monica Moreland
• Columbus Short — Hands
• Maria Thayer — Rory
• Lewis Black — Uncle Ben
• Mark Derwin — Jack Gaines
• Ann Cusack — Diane Gaines
• Hannah Marks — Lizzie Gaines
• Robin Lord Taylor — Abernathy
• Diora Baird — Kiki
• Joe Hursley — Maurice / The Ringers
• Jeremy Howard — Freaky Student
• Anthony Heald — Dean Van Horne
• Sam Horrigan — Mike Welsh
• Travis Van Winkle — Hoyt Ambrose
• Kaitlin Doubleday — Gwynn