Nathan Stevens

Jay

Cameron Richardson

Wendy

Jason Segel

Smelly Bob

James Ransone

Junebug

Elise Robertson

Mrs. Skibness

Kelsey Grammer

Mr. Skibness

Jorge Garcia

Mt. Rushmore

Don Brunner

Coach Pud

Claire Titelman

Barfetta

Colton Shires

Young Jay (uncredited)