Played by: Harvey Stephens
Film(s): The Omen (1976)
A walking advert for contraception, Harvey Stephens' teeny terror – product of the unholy union between the Devil and a jackal – is perhaps even more unsettling given that, in The Omen, he's unaware of his propensity for evil. He's just a kid, a tremendously creepy kid around whom bad things just happen to occur. As good as Jonathan Scott-Taylor and Sam Neill are as the teenage Damien and suave older Thorn in Damien: Omen II and Omen III: The Final Conflict, it's Stephens' ability to convey implacable, albeit unwitting evil in an innocent vessel that really clinches it.