Chances are that unless you have been meditating on Mount Kunlun your whole life, you have come across Don LaFontaine's voice. His signature baritone has transported watchers of his movie trailers to distant worlds of magic and sorcery, of myth and legend, of chaos and lawlessness, of ... well, you get the idea. His opening catchphrase, "In a world ..." (along with its little brother "In a time of ..." and distant cousin "One man ..."), has become one of the most recognizable cliches of movie trailers. Given how many awful attempts at imitation I have heard, I doubt anyone will ever truly measure up. Fare thee well, "Voice of God".
He rarely gets credited by name and he practically never gets to be seen on TV, so I present one of of his few actual appearances in the mainstream, displaying both his amazing intonation and his imposing presence: