The greeting comes from Scream, the 1996 slasher film directed by Wes Craven, where the masked Ghostface killer torments Sidney Prescott through taunting phone calls. Voiced by Roger L. Jackson, that calm, distorted delivery became one of horror's most quoted openings. Clips of the calls spread through movie quote pages, Halloween edits and meme soundboards, and the hello alone now signals a stalker is on the line. Its lasting appeal is how much threat it packs into two polite words before any attack happens on screen at all.