It's finally happening -- Oscar De La Hoya is making his highly anticipated return to the boxing ring in September ... and he's going up against MMA star Vitor Belfort in an exhibition match!!
Of course, 48-year-old ODLH announced his return back in March ... saying he was ready to take a fight on July 3.
The date was pushed back a few months as Oscar searched for an opponent ... and now he's finally got one -- the 44-year-old former UFC champion!