Eileen Dietz was born in New York City along with a twin sister, named Marianne.
Eileen has been involved with many award-winning projects. She was in the original Tony winning Steambath with Tony Perkins and went on to portray the Demon who possesses Regan in The Exorcist, she played the scenes that were deemed to be too controversial for child actress Linda Blair to play.
Following that was the Emmy-winning General Hospital where she portrayed Sarah a patient in a mental hospital in Port Charles and also the Emmy-winning Helter-Skelter where she was one of the Manson Gang.
She has also been involved with being The Queen Of Screams, (Norma Desmond meets Carrie in a fiery finish) and Legend Of The Mountain Witch along with The Curse Of The Flesh. There are also scripts in development to which she is attached Lullaby by Edward Romero, Krampus by Amanda Carver, Deadly Rites, and Blood Lust to be shot in England.