Agent J

, Jay or just J, is a fictional character in the Men In Black movie, its sequel Men in Black II and cartoon series, played by Will Smith in the two movies and voiced by Keith Diamond in the animated cartoon on Kids WB!

Men in Black
In the first film, his MIB career starts out when, as NYPD officer James Darrell Edwards III, he runs down a swift, wall-climbing alien on foot. When MIB Agent K notices his potential, he recruits him into the MIB. At first, James is suspicious, but he decides to join. He is registered as Agent J. J is not fond of K's diminutive references to him (son, sport, slick, kid, etc.), but gets used to it. In his various adventures, he encounters Frank, the dog; finds out that Jeebs, the pawn store owner is actually an alien, not just a buyer of stolen goods from chain snatchers like he originally thought when he was a detective; and delivers a baby Cthulhu. Their first official mission is to stop an alien bug from leaving Earth with a tiny galaxy before the galaxy's owners disintegrate the planet. During the final confrontation with the bug, K is swallowed by it in an attempt to get his gun back, leaving J to keep him on Earth. When he starts squishing cockroaches, the bug confronts him, but before it can attack him, K shoots it from the inside. When K requests to be neuralyzed (a memory-wiping procedure), J fulfills the request and his new partner is a former morgue worker, Dr. Laurel Weaver (Linda Fiorentino), who becomes known as Agent L.

Men in Black II
At some point between the first and second film, L goes back to her morgue career, and J has gained a reputation for neuralyzing all of his partners for, in his opinion, unsuitability to work at MIB. Other than that, he has developed into a superb and highly respected agent. When he is sent to get K back to face a new threat to which only he had details of locked away in his mind, J's temporary partner is an alien disguised as a (talkative) pug, Frank. When K is de-neuralyzed, J is once again the rookie, but for revenge, J gave K the Noisy Cricket (the tiny gun that K saddled him with in the first movie).