Simon Cordier
Vincent Price
Odette Mallotte
Nancy Kovack
Louis Girot
Harvey Stephens
Marcel
Don Brodie
The Horla (voice)
Joseph Ruskin
Dick Wilson
Paul Duclasse
Chris Warfield
Jeanne D'Arville
Elaine Devry
Pierre
Ian Wolfe
Captain Robert Rennedon
Stephen Roberts
Father Raymonde
Lewis Martin
Louise
Mary Adams
Andre D'Arville
Edward Colmans
Dr. Borman
Nelson Olmsted
Director
Reginald Le Borg
Short Story
Guy de Maupassant
Art Direction
Daniel Haller
Screenplay
Robert E. Kent
Producer
Music Editor
Edna Bullock
Sound Effects Editor
Alfred R. Bird
Sculptor
Lowell Grant
Special Effects
Norman Breedlove
Property Master
Irving W. Sindler
Sound
Ralph Butler
Editor
Grant Whytock
Costume Design
Marjorie Corso
Set Decoration
Victor A. Gangelin
Director of Photography
Ellis W. Carter
Original Music Composer
Richard LaSalle
Script Supervisor
Jane Ficker
Production Manager
Joseph Small
Assistant Director
Al Westen
Makeup Artist
Ted Coodley
Hairstylist
Carmen Dirigo
Edward Small