Cast of He Knows You're Alone

Caitlin O'Heaney portrays Amy Jensen, the main protagonist who becomes the target of a psychotic killer while preparing for her wedding.

Elizabeth Kemp takes on the role of Nancy, a character caught up in the terrifying events surrounding the killer targeting brides.

Dana Barron plays Diana, a friend of the main character who gets entangled in the deadly game orchestrated by the killer.

Don Scardino portrays Marvin, a character involved in the unfolding horror as the killer's sinister plans come to light.

Tom Hanks plays Elliot, a significant character who gets involved in the dangerous situation as the killer's spree continues.

James Rebhorn embodies Prof. Carl Mason, a character tied to the events surrounding the killer and the investigation into the murders.

Paul Gleason takes on the role of Det. Frank Daley, a detective working to apprehend the killer and protect the potential victims.

Steve James plays Young Man, a character whose actions have an impact on the unfolding events and the fates of the main characters.

Lewis Arlt portrays Det. Len Gamble, a detective involved in the investigation surrounding the string of murders targeting brides-to-be.

Patsy Pease plays Joyce, a character who becomes intertwined in the dangerous situation as the killer's motives are revealed.

Joseph Leon embodies Ralph the Tailor, a character whose role intersects with the unfolding events and the deadly game orchestrated by the killer.

Tom Rolfing takes on the role of Ray Carlton, a character whose actions and decisions impact the overall outcome of the suspenseful storyline.