COLE: I see dead people.

MALCOLM: In your dreams? (Cole shakes his head.) While you’re awake? (Cole nods.) Dead people, like, in graves? In coffins?

COLE: Walking around like regular people. They don’t see each other. They only see what they wanna see. They don’t know they’re dead.

MALCOLM: How often do you see them?

COLE: All the time. They’re everywhere.

M. Night Shyamalan (b. 1970) Indian-American screenwriter, director

The Sixth Sense (1999)
    (Source)

(Source (Video); dialog confirmed)