| Matt Damon | Will Hunting |
| Robin Williams | Sean Maguire |
| Ben Affleck | Chuckie Sullivan |
| Minnie Driver | Skylar |
| Stellan Skarsgard | Gerald Lambeau |
| Casey Affleck | Morgan O'Mally |
| Cole Hauser | Billy McBride |
Will Hunting has a genius-level IQ but chooses to work as a janitor at MIT. When he solves a difficult graduate-level math problem, his talents are discovered by Professor Gerald Lambeau, who decides to help the misguided youth reach his potential. When Will is arrested for attacking a police officer, Professor Lambeau makes a deal to get leniency for him if he will get treatment from therapist Sean Maguire .
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