The film was released on the same day as M.Night Shyamalan's birthday,August 6.
When the temperature drops, it means that a ghost is angry or restless.
Many of M. Night Shyamalan's family members are doctors. He pays tribute to this by having a cameo in the film as a doctor. He plays Dr. Hill.
The plot of The Sixth Sense is derived from an episode of Are You Afraid of the Dark? The episode "The tale of the Dream Girl" has a character that doesn't know he's dead, everybody but his sister speaks with him, and the significance of a ring.
In the scene when Cole says the famous line "I see dead people", the camera does a closeup on Bruce Willis face. Producer Frank Marshall was worried that might have given the game away, implying that Malcolm was a dead person. Fortunately, none of the audiences in the test screenings or afterwards picked up on it.
In 2007, the American Film Institute ranked this as the #89 Greatest Movie of All Time. This was one of the newest entries on the list (from films which were released between 1997 and 2005).
In the film, the color red signifies when the worlds of the dead and living cross over.