Horror fans take note! Here's the first 'official' trailer for "Slither," which is a rather splattery-looking horror/sci-fi chestnut from writer/director James Gunn.

"Slither" marks Mr. Gunn's directorial debut, although he's certainly no stranger to the genre fare. As a screenwriter, he has his name on both "Scooby-Doo" flicks, as well as the well-received "Dawn of the Dead" remake, and a rather funny (and sadly overlooked) comedy called "The Specials."

Basically, "Slither" is about an alien infestation that causes massive human mutation, several inevitably icky demises, and a whole lot of gooey chaos in general. "Serenity" star Nathan Fillion heads a cast that also includes the lovely Elizabeth Banks, the oily Gregg Henry, and the always hissable Michael Rooker.

Annoyingly enough, Universal recently moved "Slither" from a late January release date to one in late March, but hey, it's always cool to have an impending monster movie on the horizon. Check out the trailer and see what you think. (Asture horror geeks might notice a few shots that pay homage to the no-budget classic "Night of the Creeps.")

P.S. Hardcore horror fans cheer: "Slither" has been rated R for "strong horror violence and gore, and language."