Ron Livingston eventually got cast as the lead.

Matt Damon and Ben Affleck in “Good Will Hunting”
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If you’ve seen “Office Space,” you’re already well aware that it doesn’t star Ben Affleck and Matt Damon. (And if you haven’t seen “Office Space,” go watch it.) This being the 20th anniversary of Mike Judge’s cult classic, the workplace comedy has gotten the oral-history treatment courtesy of Entertainment Weekly, which includes the revelation that the longtime friends and collaborators were nearly cast as the lead. Either Affleck or Damon would have played the role that eventually went to Ron Livingston.