How can I be an extra on The Walking Dead?

It's basically what the question is. I really wanted to be an extra on The Walking Dead season 3 or whatever else they film. I'm pretty sure the show films in GA and luckily I live in GA. So does anyone have any info on how to become an extra zombie on the show? Thanks in advance.|||I'm still on season one but usually contests like look under the soda cap for a code or text in its all luck basically but those are the forms walking dead does it I believe|||you can try Hulu.com|||you gotta know the right people and can act like a zombie go on their websight there might be somthing there