AEW star PAC is dead at 40 … stunning news that comes less than a day after he wrestled and appeared throughout the company’s biggest show of the weekend.

All Elite Wrestling announced PAC’s death Sunday night, remembering the British wrestler — real name Benjamin Satterley — for his innovative high-flying moves and incredible in-ring ability.

PAC competed Saturday at AEW’s All Out pay-per-view in Chicago, challenging Andrade El Idolo for the AEW National Championship.

He lost the match and shook Andrade’s hand afterward … but that wasn’t PAC’s final appearance of the night.

PAC later returned during the main event … getting involved in the AEW World Championship match between fellow Death Riders member Jon Moxley and Will Ospreay.

AEW did not reveal a cause of death or any other details surrounding his passing.

The Newcastle, England native began wrestling in 2004 and joined AEW in 2019 … becoming the inaugural AEW All-Atlantic Champion and a two-time AEW World Trios Champion.

Before AEW, Satterley competed in WWE as Neville … winning the NXT Championship and becoming a two-time WWE Cruiserweight Champion.