Watch Hello Mary Lou: Prom Night II (1987) HD Full Movie Free on SolarMovie. Watch Hello Mary Lou: Prom Night II (1987) online free. Thirty years after her accidental death at her 1957 senior prom, the tortured spirit of prom queen M...Thirty years after her accidental death at her 1957 senior prom, the tortured spirit of prom queen Mary Lou Maloney returns to seek revenge.