Matt Damon character Will Hunting
Robin Williams character Sean Maguire
Ben Affleck character Chuckie Sullivan
Stellan Skarsgård character Gerald Lambeau
Minnie Driver character Skylar
Casey Affleck character Morgan O'Mally
Cole Hauser character Billy McBride
Vik Sahay character MIT Student
John Mighton character Tom
Rachel Majorowski character Krystyn
Colleen McCauley character Cathy
Matt Mercier character Barbershop Quartet #1
Ralph St. George character Barbershop Quartet #2
Rob Lynds character Barbershop Quartet #3
Dan Washington character Barbershop Quartet #4
Alison Folland character MIT Student
Derrick Bridgeman character MIT Student
Shannon Egleson character Girl on Street
Rob Lyons character Carmine Scarpaglia
Steven Kozlowski character Carmine Friend #1
Jennifer Deathe character Lydia
Scott William Winters character Clark
Philip Williams character Head Custodian
Patrick O'Donnell character Assistant Custodian
Kevin Rushton character Courtroom Guard
Jimmy Flynn character Judge Malone
Joe Cannon character Prosecutor
Ann Matacunas character Court Officer
George Plimpton character Psychologist
Francesco Clemente character Hypnotist
Jessica Morton character Bunker Hill Student
Barna Moricz character Bunker Hill Student
Libby Geller character Toy Store Cashier
Chas Lawther character MIT Professor
Richard Fitzpatrick character Timmy
Patrick O'Donnell character Marty
Frank Nakashima character Executive #1
Christopher Britton character Executive #2
David Eisner character Executive #3
Bruce Hunter character NSA Agent
Robert Talvano character NSA Agent #2
James Allodi character Security Guard
Michael Arthur character Reunion Guest (uncredited)
Christian Harmony character Student (uncredited)
Riva Di Paola character MIT Student (uncredited)
Harmony Korine character Hervé (uncredited)
Thomas Lundy character Waiter (uncredited)
Paul McGillicuddy character Race Track Fan (uncredited)
Daniel Olsen character MIT Student (uncredited)
