The Season 5 premiere of AMC’s The Walking Dead was viewed by a series high 17.3 million viewers (11 million fell in the 18-49 demographic).

The Season 5 premiere was the series’ most talked-about episode ever on Twitter with more than 1.32 million tweets. The Walking Dead is also one of the only shows in Twitter history to take up all 10 trending topics in the U.S. at once.

The zombie series’ previous record was 16.1 million viewers (10.4 in the 18-49 demo) for its Season 4 premiere.

Last week, AMC renewed The Walking Dead for a sixth season.

H/T: Inside TV @ EW