If Hollywood decided to green-light a movie about heavyweight boxing champ Andy Ruiz -- there's another huge star who's already making his pitch for the role ... Gabriel Iglesias!!!
The superstar comic is a big-time boxing fan -- and says he was STOKED when Ruiz put a beating on Anthony Joshua in the upset of the decade.
In fact, Ruiz says he REALLY wants to see Joshua sign on for the rematch so Ruiz can prove to the world it wasn't a fluke, and he's the real deal.