Remarkably, the zombie drama's third season opener 'Seed' managed a 5.8 demo rating with 18-49 adults, outperforming all cable and even terrestrial launches this fall including The Big Bang Theory, Modern Family and The Voice.
The Walking Dead's huge figures represent cable's highest ever rating for a drama series in US TV history.
Never previously had an episode of The Walking Dead topped the 9 million-viewer mark.
Charlie Collier, president of AMC, said in a statement: "Thank you to the fans for making The Walking Dead such a tremendous success. We are honoured and humbled that television's largest adult audience resides on AMC.
"So many people on both sides of the camera worked tirelessly on this project, and I thank and congratulate each of them for their amazing contribution."
Executive Glen Mazzara recently acknowledged that the show suffered from "pacing" issues in the second season, but insisted these were "long gone".
The Walking Dead season three premieres in the UK on Friday, October 19 at 10pm on FX.
> Walking Dead star on new season: 'We kill more zombies than last year'
Watch a promo for The Walking Dead season three below: