Hello Mary Lou: Prom Night II is a 1987 sequel to Prom Night (1980).
The film centers around the ghost of one Mary Lou Maloney, a girl who was accidentally killed during her prom queen crowning in the 50s. Her spirit is accidentally released by a girl named Vicki when she finds her supposed prom queen regalia in the school's prop room. Mary Lou possesses her, and sets out to get revenge on those responsible for her death and become the prom queen once more.
The movie actually has nothing to do with the original Prom Night, other than the title, and the film's school having the same name (this is a coincidence). It was filmed as its own independent movie as "The Haunting of Hamilton High", but the studio purposed it as a sequel to Prom Night in an attempt to make more money. The producer, Peter Simpson, blames this for the film's box office failure, and insists that it should be watched as its own movie, not a sequel.
The film has developed a small cult following following its release on home video, and got a direct-to-video sequel of its own: Prom Night III: The Last Kiss.
This film has the examples of:
- Adorkable: Josh, genial supplier of (often lewd) quips and inventor of the (ineffective) potato-powered radio.
- Accidental Murder: Mary Lou's death is caused by Billy dropping a stink bomb on her as she is crowned, which ignites her dress, turning her into a Woman on Fire.
- Alpha Bitch: Mary Lou when she was alive, and Kelly in the present, though Kelly is more of a deconstructed type; venomous to her rivals but nice to everyone else, with hints of insecurity.
- Ambiguously Bi: Mary Lou, as suggested during the scene of her in Vicki's body walking into the girl's shower room completely naked to kiss Monica on the forehead. Monica might count as well, as she is shown enjoying the kissing at first.
- Beware the Nice Ones: Vicki loudly calls Kelly a bitch for mocking Jess after her death, and also proceeds to slap her.
- Create Your Own Villain: Sort of. Billy accidently killed Mary Lou after a silly prank gone wrong, so now she trying to get revenge on Billy for what he did.
- Creator Cameo: Just before the climax, writer Ron Oliver plays a prom attender who makes an unwitting Double Entendre.
- Deadly Prank: Billy simply tried to embarrass Mary Lou as a revenge for cheating on him and rubbing it in his face, but instead caused her death.
- Demonic Possession: Once Mary Lou's spirit is freed, she starts harassing Vicki until she manages to take over her body.
- Depraved Bisexual: Mary Lou swings both ways, as evident on her attempt to seduce Monica.
- Disproportionate Retribution: Jess chips off one of the rhinestones on the prom queen tiara, which causes Mary Lou's spirit to violently toy with her by dragging her around the art room by the cape from the trunk, making it look like that she is going to chop he head off with a paper trimmer before hanging her by the cape and then throwing her body out the window.
- Downer Ending: Mary Lou is subdued by now older Billy by putting her prom crown on her head, which presumably satisfies the conditions of her revenge. He also decides to steal a kiss from her as a form of trying to make right what happened 30 years ago. Cue romantic flash back to the original prom. What is actually happening is that the prom queen is using the opportunity to Body Surf into the guy, who then goes on to (presumably) kill his children off-camera. So, essentially, The Bad Guy Wins.
- Establishing Character Moment: Mary Lou's first scene has her going to a Confessional and listing various adulterous behaviour to the priest. But instead of asking for forgiveness, she instead tells him that she loved every minute of it and scribbles "For a good time call Mary Lou" on the confessional booth's wall with her lipstick.
- 555: Averted. The phone number Mary Lou writes on the confessional booth was screenwriter Ron Oliver's actual phone number in Toronto at the time. He used it as a gag just to see what would happen, but wound up never receiving a phone call asking for Mary Lou.
- Freeze-Frame Bonus: When Vicki studies Mary Lou's yearbook photo, pause and take a closer look at the entry to the right of Mary Lou, describing Paul White. His nickname is Petunia, his favorite activity is hanging around the locker rooms after football practice while dropping soap, and his life's ambition is to have a body like Jayne Mansfield.
- Full-Frontal Assault: Mary Lou hunting Monica through the locker room. Hot yet terrifying. A particularly effective illustration of the trope in that the character who is unashamedly naked is visually much more powerful and intimidating than the one who hides her nudity with a Modesty Towel, even though both are young women of approximately equal build and by rights should be much more evenly matched.
- High-Voltage Death: Mary Lou electrocutes Josh as he tries to rig the prom queen vote tally for Kelly's favour with his computer.
- Laser-Guided Karma: Smug Kelly ends up having to give a blow job to win the title of the prom queen, doesn't get it, and is killed completely by accident when she gets stabbed in the chest when one of the neon lights in the auditorium comes loose during Mary Lou's rampage.
- Lovable Alpha Bitch: For all her venom towards Vicki and Monica, Kelly's friendly approach to everyone else hints a genuine desire to be liked.
- Made of Plasticine: That neon light doesn't really look like its hitting Kelly that hard. It just kinda... falls against her. It seems like impalement would take more force.
- Mind over Matter: Mary Lou kills Monica by crushing her inside the locker that she's using to hide from her.
- My Beloved Smother: Vicki's mom comes across as a really watered down version of Margaret White, though thankfully her dad is still around and he is much more understanding.
- Not My Driver: The film ends with our protagonists getting in a car that's being driven by Mary Lou. It is likely that they were killed by her.
- Parental Incest: Late in the movie, Mary Lou (while controlling Vicki's body) seduces Vicki's father and later tries to seduce her mother when she walks in on them, before ultimately killing them both.
- Percussive Prevention: In order to protect him, Principal Cooper knocks out his son Craig when he tries to go look for Vicki.
- Plot-Triggering Death: Mary Lou's death instigates everything that happens in the film.
- Really Gets Around: Mary Lou when she was still alive, which ultimately led to her cuckolded boyfriend Billy accidentally killing her.
- Sequel: The Original Title: Done by combining Titled After the Song ("Hello Mary Lou" is a pop song from the sixties) and Numbered Sequels.
- Shout-Out Theme Naming: Plenty of characters share surnames with famous horror creators: Craven, King, Romero, Browning, Dante, Carpenter, Waters, Henenlotter....
- Shower Scene: Gratuitous nudity is provided when Mary Lou, in the guise as Vicki, tries to seduce Monica while she is taking a shower.
- Sliding Scale of Comedy and Horror: This film has a much lighter tone than the previous Prom Night, and could be considered a black comedy, but still has enough genuine terror to split it about half/half.
- Small Role, Big Impact: Mary Lou is the central character and the film revolves entirely around her, but Lisa Schrage only has about six-and-a-half minutes of screen-time - appearing at the beginning, end, and sporadically seen through photographs in between. Most of Mary Lou's scenes occur while she is possessing Vicki.
- Speak Ill of the Dead: Kelly, being the Alpha Bitch that she is, does this after Jess' death, (specifically the day after her funeral) straight to the faces of the latter's best friends, Vicki and Monica, no less! Vicki understandably doesn't take it well.Kelly: The competition seems to be dwindling. You two should take the hint from Jess.
- Sour Outside, Sad Inside: Kelly's attempt to bribe Josh to rig the voting tally, and her sad, defeated reaction to his price of fellatio, hint at insecurity.
- The Vamp: Mary Lou was a spiteful bitch even before she died; killing her gave her a power boost and propelled her into pure evilness.