Producers promise the movie will tell the story of how Vaccaro and Knight relentlessly pursued Michael Jordan to sign a shoe deal with Nike back in the 1980s. Filming officially kicked off this summer.
Vaccaro says he and his wife, Pam, were actually invited to the set recently, and they had a blast. He tells us us they got to meet with Damon while there, and told him they share a funny connection with Jason Bourne.
Vaccaro also told us he was blown away when he saw the entire cast -- explaining, "It's like 'Gone With The Wind' or something. I mean, my God, there are no guys that the world's not going to know."
The film doesn't yet have a title or an official release date yet.