Hayden Panettiere’s final moments revealed in frantic 911 call from boyfriend’s brother

Hayden Panettiere’s final moments were captured in a frantic 911 call, as the brother of her on-and-off boyfriend desperately tried to revive the actress after finding her unconscious at a South Carolina apartment on Aug.

16.

"​​Oh, God, oh, my God — you do like CPR or something?" Zach Hickerson asked the dispatcher in the newly released audio obtained by ABC News and CBS News .

The seven-minute call reveals Hickerson performing CPR on Panettiere while Brian Hickerson administered Narcan.

Panettiere, 36, was found unresponsive at the Greenville residence on Aug.

16.

Zach told the 911 operator that he had arrived at the apartment after returning from church and discovered his brother and Panettiere inside.

HAYDEN PANETTIERE’S BOYFRIEND’S BROTHER REVEALS WHAT HAPPENED INSIDE AIRBNB BEFORE ACTRESS'S DEATH "He woke up, and his girl ... she’s unconscious," Zach said.

The dispatcher asked whether Panettiere was breathing.

POLICE SHOW UP AT HOME LINKED TO HAYDEN PANETTIERE’S ON-AND-OFF BOYFRIEND DAYS AFTER HER SUDDEN DEATH "No, I don’t think so," Zach replied.

The operator then instructed Zach to lay Panettiere flat on her back and begin CPR while emergency crews rushed to the scene.

HAYDEN PANETTIERE’S REP SLAMS ‘GOSSIP AND SPECULATION’ AS DEATH INVESTIGATION DEEPENS "OK, we need to start CPR," the dispatcher said.

"I’m going to tell you how to do CPR, OK?" The operator proceeded to walk Zach through chest compressions and mouth-to-mouth resuscitation.

HAYDEN PANETTIERE'S OVERDOSE SHOWS FENTANYL CRISIS 'DOESN'T DISCRIMINATE,' STANFORD PSYCHIATRIST SAYS "We’re going to do this 500 times or until help can arrive," the dispatcher said, according to ABC News.