Jennifer Lopez: Happy Bring Your Boyfriend to Work Day

Jennifer Lopez is the best employment agency, and girlfriend, Casper Smart's ever had -- 'cause somehow the guy managed to score a role on her new cop drama.

Casper was on the set in NYC on Monday, shooting a scene with J Lo's "Shades of Blue" co-star Ray Liotta. Jennifer stars on the NBC show, but she's also executive producer.

Dating J Lo ... it pays in so many ways. Beyond the obvious, that is.