Jamie Foxx Talks 'Epic Cameos' in His New Flick

Floyd Mayweather and The Game are just the beginning ... Jamie Foxx says he's got some HUUUGE stars making surprise appearances in his new movie -- and revealed one right on the street.

Foxx was leaving Drake's birthday party at Delilah in L.A. when he ran into French Montana -- and revealed he's ALSO in "All-Star Weekend" ... which Jamie is producing and directing.

The two talk shop -- and then Foxx breaks down French and Floyd's skills on camera.

BTW, there's rumblings LeBron and Steph Curry will appear in the flick -- and yeah, that WOULD be epic!