CHUD is reporting that Firefly / Serenity star, Nathan Fillion, has recently been added to the cast of James Gunn's horror thriller, Slither.

The actor would join Gregg Henry, Michael Rooker, Elizabeth Banks, and Rheagan Wallace.

Slither revolves around an alien plague that infects a small town, setting a local (Rooker) on a murderous spree. His wife (Banks) teams up with an old flame to combat the situation.