Joe Goldberg is the fictional villain protagonist of the You series of novels by Caroline Kepnes, and the television series of the same name, where he is portrayed by American actor Penn Badgley. He is played by Gianni Ciardiello, Aidan Wallace and Jack Fisher as a youth, and as his inner self by Ed Speleers. Joe is a serial killer and stalker who goes to extreme lengths to insert himself into the lives of the women he is transfixed by.