Bill Hader will now be a full-time writer on 'South Park'

South Park has always been Matt Stone and Trey Parker's baby, but now they are bringing another big name into the writer's room full-time: Bill Hader. As seen in the recent documentary "6 Days to Air" Hader has already been in the writer's room and has also attended several writer's retreats with Matt, Trey, and the rest of the crew. He seems to gel well with the other writers and his own brand of humor should be a welcomed addition. It'll be interesting to see an episode penned entirely by Hader, if it even happens: Matt Stone and (especially) Trey Parker have been the driving force behind every episode thus far. He'll start writing for the upcoming 17th (!) season premiering September 25th!