Jamie Foxx is BECOMING Mike Tyson -- he's got the voice down ... and now he's showing off his yoked out body!!
Foxx is starring in an upcoming biopic about the boxing legend -- he'll play both young Mike and older Mike. He's been working on the project for years.
But, the production seems to be picking up steam -- and during a recent episode of "Catching Up with Mike Birnbaum," Jamie revealed how he's transforming his body to look just like Tyson.
So, how's he doing it?