Grey Aliens are intelligent extraterrestrial beings who visit and traffic on Earth. They are human-like, with grey skin, large bulb-shaped heads and enormous black eyes. They have long, thin fingers which they use to urinate. They wear clothes, travel in saucer-shaped space crafts and leave signs on corn fields, possibly a form of graffiti to perplex human beings.
The Grey Aliens appeared only in Scary Movie 3.
In a deleted scene showing an alternative ending for the film, the aliens are depicted as villains. They differ to the main film aliens in appearance, as they are shown to be mean looking with bulkier heads, darker grey skin and don't wear clothes. They also don't speak English. They attack the main characters, but they are defeated by George Logan when he transforms into a gigantic version of the Hulk.
- The Aliens say hello by strangling each other.
- The Aliens say goodbye by kicking each other in the crotch.
- The Aliens urinate out their index finger.
- They can not open doors (maybe).
- Two of them use the reflection in a knife to see Cindy's underwear.
- Part of their reconnaissance procedures involves infiltrating residences as local media characters - in Earth's case, as Michael Jackson