Her death was announced by producer Jim Pierson of Dan Curtis Productions, on behalf of Parkers family.
Frids storyline changed the show from a moody, Gothic Jane Eyre-key in serial into a flat-out horror show.
As with most of his gut instincts, Curtis was right.

Lara Parker as Angelique, ‘Dark Shadows’ 1969Getty Images
Parker became an instant sensation, at the time rivaled only by Barnabas among the shows youthful fandom.
The gamble paid off, and quickly.
Within days of arriving in New York in 1967, Parker was cast as Angelique.

Lara Parker and David Selby in ‘Night of Dark Shadows’ (1971)Everett Collection
The quartets appearance did in fact make the final cut, albeit briefly.
None of the originals was particularly fond of the jokey 2012 film.