Professor Sherman Klump is getting married. And the Klump family could not be more delighted for him. But Buddy Love, his Mr. Hyde alter-ego from the first film, is back and trying to make it on his own. Sherman decides to rid himself of his monstrous nemesis by extracting Buddy's DNA from his system. But Buddy bursts full-bodied into Sherman's world and lays claim to the professor's astounding invention - a revolutionary youth serum. Desperate to keep it from Buddy, Sherman hides the serum in the Klump family home, thinking it will be safe. Buddy correctly discovers where Sherman has placed the serum, but to get it, he has to deal with the entiire Klump family first.

Stars Eddie Murphy and Janet Jackson.