Billy Madison
Eric Gordon
Principal Max Anderson
Veronica Vaughn
Brian Madison
Frank
Jack
Carl Alphonse
Juanita
Miss Lippy
Pete
Cook
Rollo the Janitor
Nodding 1st Grader
Penguin
O'Doyle (Grade 1)
Scotty Logan (Grade 1)
Tricia Labonte (Grade 1)
2nd Grade Teacher
2nd Grader
Ted 'Old Man' Clemens
Attractive Lady
Clown
Driver
Ernie (Grade 3)
O'Doyle (Grade 3)
Kyle
Butler
Maid
Dan (Grade 3)
Tour Guide
4th Grade Teacher
Nurse
Architect
Lunch Lady
Pothead
Mr. Oblaski
Nancy Connors
O'Doyle (Grade 9)
Paul
Rod
Crazy Person
Joyce
Tenth Grader
O'Doyle (Grade 12)
Jennifer (Grade 3)
Susan (Grade 3)
Drama Teacher
Lawn Guy
Rock Singer
Principal
Mr. O'Doyle
Mrs. O'Doyle
Newswoman
Haitian Gardener
High School Girl
3rd Grader
Jet Skier
Fire-eater
Danny McGrath (uncredited)
Bus Driver (uncredited)