Cast of Paranormal Activity

Katie Featherston plays Katie, one half of the couple who is being haunted. She becomes increasingly disturbed by the activity in their home.

Micah Sloat portrays Micah, Katie's boyfriend who is determined to capture evidence of the paranormal activity on camera, leading to escalating events.

Mark Fredrichs appears as The Psychic, a character who is brought in to help investigate and deal with the haunting in the couple's home.

Amber Armstrong plays Amber, a friend of Katie who provides support to the couple as they deal with the supernatural occurrences.

Ashley Palmer portrays Diane, another friend of Katie who becomes involved in trying to understand and address the paranormal events.

Crystal Cartwright plays the Exorcism Nanny, an uncredited character involved in the attempts to rid the house of the paranormal presence.

Spencer Marks appears as Dr. Johann Averies, an uncredited character who may be consulted in the film regarding the supernatural occurrences.

Randy McDowell portrays Lt. Randy Hudson, an uncredited character who may be involved in the investigation of the strange happenings.

James Piper plays Richard, an uncredited character who may have a role in the unfolding events related to the paranormal activity.