Jason Voorhees arrived to read for the character of Jack. Before he could get started, Cunningham walked in and offered him a different part: Jason. Without having read a single word, Cunningham just looked at Ari and said, "You're the right size, you've got it." In the original "Friday the 13th", Ari Lehman is seen only in a brief flashback as the surprise ending. Subsequent actors who portrayed a young Jason include Timothy Burr Mirkovich in "Jason Takes Manhattan" and Spencer Stump in "Freddy vs. Jason". The adult role of Jason Voorhees has been played by various actors, some not credited, others
Jason Voorhees ending, as he was available for the reshoot and had been the production's second choice to portray the role of Jason during the original casting. For the 2009 remake, stuntman Derek Mears was hired to portray Jason Voorhees at the recommendation of makeup special effects supervisor Scott Stoddard. Mears's pleasant demeanor had the studio worried about his ability to portray such a menacing character on screen, but Mears assured them he would be able to perform the role. When Mears auditioned for the role he was asked why they should hire an actor over just another guy in a mask.