The Walking Dead is based on the comic book series written by Robert Kirkman, with Glen Mazzara serving as the showrunner. Greg Nicotero is the co-executive producer and Gale Anne Hurd, David Alpert and Frank Darabont executive produce.
“Today we are pleased to announce that the ‘dead’ shall live as we proudly renew The Walking Dead for a third season on AMC and, globally, with our terrific partners at Fox International Channels,” stated Charlie Collier, AMC’s President. “We are thankful for everyone’s contribution in front of and behind the camera as we continue to make The Walking Dead a unique television experience. And, we are so proud as it continues to set viewership records around the world.”
Source: AMC – October 25, 2011