Casper Smart -- Screw J. Lo ... I'm Fully Booked

Casper Smart doesn't need Jennifer Lopez to make it in Hollywood ... he's been working with big stars like Nicki Minaj and he's not even banging them.

We're told Casper just booked a co-starring role as the bad guy in an upcoming movie, "Wild for the Night" ... a flick about electric dance music. He's also choreographing all the dances.

Casper and J. Lo broke up in April and most people thought his face would end up on a milk carton -- not so by a long shot. Here's how he's been filling his time:

-- Choreographed Nicki Minaj's "Anaconda" music video
-- Appeared on "The Big Bang Theory"
-- Choreographed the opening act at the MTV VMA's
-- Starred in a film called "Street"
-- Choreographed Jessie J's music video for "Burnin' Up"
-- Bought a new home

We got Casper out this week at Venice Beach ... he says he has a secret to success post J. Lo.