Elenco

• Linda Blair — Regan Teresa MacNeil
• Ellen Burstyn — Chris MacNeil
• Jason Miller — Father Damien Karras
• Max von Sydow — Father Lankester Merrin
• Lee J. Cobb — Lt. William F. Kinderman
• Wallace Rooney — Bishop Michael
• Ron Faber — Chuck / Demon (voice)
• Titos Vandis — Uncle John
• Jack MacGowran — Burke Dennings
• Barton Heyman — Dr. Samuel Klein
• Peter Masterson — Dr. Barringer
• Robert Symonds — Dr. Taney
• Donna Mitchell — Mary Jo Perrin
• Robert Gerringer — Senator at Party
• Kitty Winn — Sharon Spencer
• John Mahon — Language Lab Director
• Gina Petrushka — Willi
• Rudolf Schündler — Karl
• Mercedes McCambridge — Demon (voice)