'Outer Banks' Stand-In for Chase Stokes Killed in Hit-and-Run Accident

A stand-in for Chase Stokes on the hit show 'Outer Banks' was killed this week in a horrific car accident -- this as the new season continues to film in South Carolina.

22-year-old Alexander 'AJ' Jennings was struck by two vehicles early Tuesday morning in Charleston, both of which fled the scene. He passed away as a result of injuries sustained from the double hit-and-run -- the coroner's office has his time of death listed at 3:13 AM.

According to preliminary reports, Jennings was walking along a main thoroughfare between James Island and Folly Beach when he was hit around 2 AM. The first vehicle left him for dead, and not too long after that ... Jennings was apparently hit by a second vehicle that also split -- although that driver was reportedly later pulled over in a traffic stop.

Life-saving measures were unsuccessful ... Jennings succumbed to his injuries. His employer, Kimmie Stewart Casting, confirmed Jennings had been working on 'OB' as a photo double/stand-in for John B -- the main character of the Netflix series, portrayed by Chase.

KSC writes, "I cannot fathom the shock and tragedy of AJ's sudden loss and our thoughts are with his family and friends during this difficult time. I understand this message may be difficult to process for those of you that met & became fast friends with AJ."

The agency adds that Netflix has grief counseling available to those who need it -- as AJ appears to have had a lot of friends on the production. One of those friends, it seems, was Chase himself ... who also honored AJ by taking to social media.

He writes, "Still trying to process why certain things happen, and why the world works in the ways that it does. My heart is shattered. Your life was just starting. We JUST talked about how pumped you were about your tunes, how far you'd come with that ole 6 string and your want to keep creating art. Always always making others hearts warm and being so damn selfless." CS went on to say AJ had touched all of their lives, adding ... "Fly high angel."