The Dead to Me star is set to play Pam Voorhees ... of her son, Jason, who she believes drowned while counselors were having sex instead of watching him, and to stop the camp from ever reopening.

Linda Cardellini has officially been cast as Pamela Voorhees in "Crystal Lake," Peacock's "Friday the 13th" prequel.

Cardellini will star as Pamela Voorhees in the expanded prequel ... But in the original film, Jason is a child who drowns at Camp Crystal Lake. His death leads his mother, Pamela, to seek revenge ...

Linda Cardellini will play Pamela Voorhees ... son, Jason, drowned in Crystal Lake while the negligent counselors were partying, so she exacted her revenge on the new counselors when the camp ...