The Omen (1976)

The young son of an American diplomat and his wife, living in London, turns out to be marked with the sign of Satan, the infamous '666'. It soon becomes apparent that he could be the Anti-Christ incarnate and possesses the evil powers to stop anyone who stands in his way. Mysterious deaths surround an American ambassador. Could the child that he is raising actually be the anti-christ? The devil';;s own son?