Hello Mary Lou: Prom Night II may be derivative, but for the most part it's clever enough to trade on its sources with humor and class. It's Peggy Sue Lives on Elm Street, with dollops of Carrie, The Exorcist and a half dozen other genre stalwarts.

Richard Harrington

Washington Post

Before it's done, Hello Mary Lou has touched most of the bases, flirting with taboos (incest, locker-room lesbianism, fingernails on the blackboard) and purloining effects from the Nightmare on Elm Street series. It's a badly made film, as awkward as can be, and long stretches of it make no sense whatsoever. Nor does it manage, as the better slasher films do, to re-create a high-school milieu of even passing authenticity. [21 Oct 1987, p.D5]

Bill Cosford

Miami Herald