Jason Voorhees is a fictional character and the antagonist of the Friday the 13th series. He first appeared in Friday the 13th as the young son of camp-cook-turned-killer Pamela Voorhees, in which he was portrayed by Ari Lehman. From Wikipedia
The Peacock and A24 production 'Crystal Lake' gains momentum with Cardellini's casting following earlier delays and a change in showrunner.