When in L.A. ... you get in the movies -- just like Clippers star Austin Rivers, who locked up a pretty sweet cameo in the new 'Teenage Mutant Ninja Turtles' movie!
We spoke with Austin -- who's still recovering from that gnarly eye injury he suffered earlier in the NBA playoff -- and he told us he was super stoked to get a role in a scene shot at Madison Square Garden.
So, what's next ... "SPACE JAM 2" -- that is, if producers hit him up for a role.
C'mon LeBron, you can pull some strings, right?