Sonny Vacccaro -- the shoe brand industry legend -- tells TMZ Sports he's absolutely fired up for his upcoming biopic ... explaining he loves that Matt Damon is playing him in the movie!!!
"This is the best thing that I could have ever imagined," the 83-year-old said. "And it's bigger because I never imagined it could happen. It's off the charts. It's off the charts."
Damon and Ben Affleck have teamed up to make the movie about Vaccaro's life -- with Affleck set to play famed Nike honcho Phil Knight in the flick.