 Chris FarleyThomas 'Tommy' Callahan III | Thomas 'Tommy' Callahan III |
 David SpadeRichard Hayden | Richard Hayden |
 Brian DennehyThomas 'Big Tom' Callahan | Thomas 'Big Tom' Callahan |
 Julie WarnerMichelle Brock | Michelle Brock |
 Bo DerekBeverly Barish, aka Beverly Burns | Beverly Barish, aka Beverly Burns |
 Rob LowePaul Burns (uncredited) | Paul Burns (uncredited) |
 Dan AykroydRay Zalinsky | Ray Zalinsky |
 Sean McCannFrank Rittenhauer | Frank Rittenhauer |
 Zach GrenierTed Reilly | Ted Reilly |
| JJames BlendickRon Gilmore | Ron Gilmore |
 Paul GreenbergSkittish Student | Skittish Student |
 Robert K. Weiss'No' Manager | 'No' Manager |
 Corey SevierBoy in Commercial | Boy in Commercial |
 Lorri BagleyWoman at Pool | Woman at Pool |
 John FarleyRoy | Roy |
 Kevin FarleyGuy at Dad's Party | Guy at Dad's Party |
 Frank WelkerDeer (voice) | Deer (voice) |
 Adrian TrussCop#1 | Cop#1 |
| CClinton TurnbullYoung Tommy | Young Tommy |
| RRyder BrittonYoung Richard | Young Richard |
| GGraeme MillingtonFrat Boy | Frat Boy |
 Michael CramFrat Boy | Frat Boy |
 Dean MarshallFrat Boy | Frat Boy |
 Trent McMullenFrat Boy | Frat Boy |
 Philip WilliamsDanny | Danny |
| DDavid MalloySammy | Sammy |
 Roy LewisLouis | Louis |
 Austin PoolObnoxious Bus Kid | Obnoxious Bus Kid |
| WWilliam DunlopR.T. | R.T. |
| JJack JessopPriest | Priest |
