The Amazing Jeckel Brothers is the fifth studio album by American horrorcore band, Insane Clown Posse. It was released on May 25, 1999. The producers of the album were Insane Clown Posse and Mike E. Clark. The album was the fifth of the "Joker Cards" in the Dark Carnival mythology. The album featured guest vocals such as Ol' Dirty Bastard, Snoop Dogg, The Jerky Boys and Twiztid.