From Dangerous Minds:
The moviegoing public got its first look at actor Matthew McConaughey in his hilarious breakout role as Wooderson, the “too old to be hanging out with high school kids guy” in Richard Linklater’s 1993 cult classic Dazed and Confused. At the time the film was shot, McConaughey was still a student at the University of Texas at Austin’s College of Communication. He graduated in the spring of 1993 with a Bachelor’s degree in Radio-Television-Film and had planned to attend law school, before realizing that he was probably not cut out to be a lawyer.
In the clip below, posted by Criterion, we can see McConaughey nail his Wooderson audition—probably the most iconic stoner in cinema not played by Cheech Marin or Tommy Chong—reading lines with Wiley Wiggins in 1991.