Lisa Schrage as Mary Lou.

Mary Lou Maloney is the undead primary antagonist of the horror film "Hello Mary Lou: Prom Night II" (Lisa Schrage) and its horror-comedy sequel "Prom Night III: Last Kiss" (Courtney Taylor).

Hello Mary Lou: Prom Night IIEdit

The film begins in 1957 with a seventeen-year-old Mary Lou. While not yet a serial killer, she has a willing penchant for being bad. This is exemplified in the opening scene, where she, inside of a confessional, tells a priest that she disobeys her parents, uses the most sinful of curses, and is highly promiscuous. Having received the exact stunned reaction from the priest that she had been hoping for, Mary Lou adds with a smile "...and I loved every minute of it." To add insult to injury, she also writes "For a good time call Mary Lou" on the side of the booth.

At the Hamilton High School prom, Mary Lou brings Billy Nordham as her date. He is so enamoured with her that he even presents a ring to her that has her initials inscribed on it. Not but a few moments after receiving this gift, Mary Lou sends Billy on an errand, and then runs off to make out with another boy, Buddy Cooper. Hurt by this, Billy finds a stink bomb and then waits until Mary Lou's prom queen coronation to toss it at her. To his horror, however, the bomb manages to catch her dress on fire and she burns to death.

Jumping ahead to the year 1987, protagonist and student of Hamilton, Vicki Carpenter, happens to find a trunk containing some of Mary Lou's old possessions, and in doing so, releases her spirit from the underworld. When Vicki's pregnant friend Jess Browning attempts to refashion the discovered clothes, Mary Lou kills her via strangulation.

From here, much of the middle section of film involves Mary Lou playing mind games with Vicki. The heroine begins to see strange things in the cafeteria food, hallucinates that the rocking horse in her bedroom has come to life through demonic personification, and ultimately gets sucked into the blackboard of one of her classrooms. From this point, Mary Lou obtains full control of Vicki's body.



Mary Lou's first item on her agenda is to kill Buddy, who has since become a priest himself, by stabbing him with a crucifix. She then toys sexually with another friend of Vicki's, Monica, and then fatally crushes her while she hides inside of a locker. Her games of seduction extend to Vicki's boyfriend, Craig, and the girl's own father, Walt. When the wife of the latter catches "Vicky" making out with him, Mary Lou blasts her through the front door. The villainess eventually makes her way back to the high school, where another prom is taking place.

Mean-girl Kelly Hennenlotter bribes a nerdy student named Josh with sexual favors in exchange for him altering the vote tally so that she will be queen instead of Vicki. Discovering this, Mary Lou electrocutes him through his computer.


Mary Lou, reclaiming her own body in "Prom Night II".

Billy, now the principal of the school, after realizing that Mary Lou has returned, knows that he has to stop her. He manages to shoot her during the coronation, but this only causes her to transform into her original form. In her rage, Mary Lou begins killing people around her, including Kelly. Mary Lou moves to take Craig back to the underworld with her, but before she succeeds, Billy manages to place the crown on her head and kisses her. Realizing that she has finally attained prom queen status, she then vanishes, though only momentarily. For when Vicki, Craig and Billy return to the outside, the former two realize that Mary Lou was not destroyed, but has instead taken possession of the principal.

Prom Night IIIEdit

The film starts off in Hell, where Mary Lou and a handful of exhausted other girls are forced to perform a chorus line. The villainess manages to escape this punishment by using a nail file on her leg shackle. She then returns to her old Hamilton High in the mortal plane.

Mary's first victim to celebrate her return is a janitor named Jack. who she electrocutes with an old jukebox until his pacemaker explodes. Shortly after, she begins taking a shine to a male student named Alex Grey who happens to be unhappy with his life, as well as having doubts about his future at the time. Using her powers, she aids him in his athletic ability, detours bullies from assaulting him, and cheats to ensure his failed grades become positive ones. The latter method involves her second vctim - a teacher named Mr. Walker - who Mary kills with an ice cream mixer.

Mary Lou 3 Prom Night III
Mary finally meets Alex face to face and introduces herself. Moments later, he then finds the corpse of his teacher, which has been gruesomely fashioned to create a large ice cream sundae in his torso. Immediately bewitched by the undead woman, he gets rid of the body, though remains very unsettled about it. Mary Lou simply retorts with "Who's going to miss another science teacher?"

Mary Lou becomes Alex's new girlfriend, though one he keeps on the side from his other current love interest, Sarah Monroe. He tries to establish some "ground rules" that she has to stop her killing from here on out, but quickly backs down due to her seductive and semi-threatening nature. When she moves on to kill Ms. Richards (a guidance counselor whom Alex clashed with)  by drenching her in battery acid, as well as angry bully Andrew Douglas by throwing a football-shaped drill at his abdomen, Alex decides that he wants nothing more to do with her. Mary doesn't give up that easy, however; a fact that she is more than willing to inform him of.

Mary Lou 6 Prom Night III
Mary Lou disguises herself as Sarah and attempts to seduce Alex's good friend, Shane. She tells him that he has a big heart, and then opts to show it to him by driving her hand through his chest and into the sofa. By this point, Alex transitions from wanting to ignore her to destroying her. He manages to lure her back out at the high school and commits to giving himself over to her on the condition that she finally leaves everyone else alone. She accepts, and the two disappear through a portal that leads to a nightmarish version of the school.

Sarah manages to follow, and eventually finds Alex restrained to a chair, with Mary Lou about to place a crown - which happens to have a lethal, whirring drill emerging out the bottom - onto his head. The two females have a brief scuffle, but Sarah comes out on top when she stuffs a bomb into her rival's cleavage, which explodes seconds later.

Alex and Sarah return to the mortal plane, believing Mary Lou to finally be dead and that their long nightmare has come to an end. They embrace with emotion and then stop off at a diner so that they can call their parents. Alex runs up to the payphone, but is surprised to find that it accepts dimes, rather than quarters. Before the two can piece it together, Mary Lou appears in the back seat of the car behind Sarah and kills her by skewering her hand and arm straight through her body. The villainess then laughs evilly as Alex runs around in a panic with the realization that his ordeal is far from over.