Much like its predecessor, AMC's new drama, "Fear the Walking Dead," is well on its way to becoming a ratings juggernaut. The series' debut set a new record with 10.1 million viewers in overnight numbers, and now, with the Live + 3 ratings coming in, that number has grown quite a bit.

After factoring in DVR and OnDemand viewers, the total audience for the zombie series' first episode stands at 13.3 million, 8.5 of which are in the coveted 18-49 age range. That's a 32% and 36% increase over the Live + Same Day ratings reported earlier this week.

"Fear the Walking Dead" Debuts with Record-Breaking 10.1 Million Viewers

The 10.1 million live/same-day viewers for Sunday's series premiere of "Fear the Walking Dead" makes it the highest-watched series premiere in cable TV history. The previous holder of that record was also an AMC series: "Better Call Saul," which attracted 6.9 million viewers in February.

"It is increasingly difficult to evaluate a show's success on night one," AMC president Charlie Collier said in a statement. "However, we are releasing these live/same day ratings because 'Fear the Walking Dead' delivered record-breaking numbers that are all the more special in this era of time-shifted viewing and audience fragmentation."

"Fear the Walking Dead," created by franchise creator Robert Kirkman and executive producer Dave Erickson, aims to expand the world of AMC's original "Walking Dead" TV series -- which has been a massive hit since its 2010 debut, and is based on the Image Comics series written by Kirkman and illustrated by Charlie Adlard and, originally, Tony Moore. The first "Fear the Walking Dead" season is set to run for six episodes, and the series has already been renewed for a 15 episode second season.