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->''An old flame returns.''

'''''Hello Mary-Lou: Prom Night II''''' is a 1987 sequel to ''Film/PromNight1980''.

The film is centered around the ghost of Mary-Lou Maloney, who was accidentally killed during her Prom Queen crowning in the 50's. Mary-Lou's spirit is accidentally released by a girl named Vicki when she finds her old prom dress. Mary-Lou then possesses Vicki, and sets out to get revenge and become the prom queen once more.

The movie actually has nothing to do with the original ''[[Film/PromNight1980 Prom Night]]'', other than the title, and the film's school having the same name (this is a coincidence). It was filmed as it's own independent movie as "The Haunting of Hamiltom High", but the studio purposed it as a sequel to ''[[Film/PromNight1980 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 it's own movie, not a sequel. The film has developed a small cult following following it's release on home video, and got a direct-to-video sequel of it's own: ''Film/PromNightIIITheLastKiss''.

!!This film has the examples of:

* AccidentalMurder: Mary-Lou's death by fire is caused by Billy dropping a stink bomb on her as she is crowned, which ignites her dress.
* AlphaBitch: Mary-Lou when she was alive, and Kelly in the present.
* [[spoiler:TheBadGuyWins: 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 BodySurf into the guy, who then goes on to kill his children off-camera.]]
* BewareTheNiceOnes: Vicki has loudly called Kelly a bitch for mocking Jess after her death and has also slapped her.
* DeadlyPrank: Mary-Lou's death.
* DemonicPossession: Mary-Lou's method of operation.
* DepravedBisexual: Mary-Lou swings both ways, as evident on her attempt to seduce Monica.
* DisproportionateRetribution: Jess chipped off one of the rhinestones on the prom queen tiara, which caused 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 she was going to have her head chopped off by a paper trimmer before hanging her by the cape and then throwing her body out the window.
* EvilIsPetty: Is. It. ''Ever''.
* FollowTheLeader: ''Hello Mary-Lou'' leans towards supernatural slasher genre la ''Elm Street''.
* LaserGuidedKarma: Smug Kelly ends up having to give a blow job to win prom queen, doesn't get it, and [[spoiler: 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.]]
* MadeOfPlasticine: That neon light doesn't really look like it hit [[spoiler: Kelly]] that hard. It just kinda...fell against her. It seems like impalement would take more force.
* MyBelovedSmother: 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.
* NamedAfterSomebodyFamous: Plenty of characters share surnames with famous horror creators: [[Creator/WesCraven Craven]], [[Creator/StephenKing King]], Romero, Browning, [[Creator/JoeDante Dante]], [[Creator/JohnCarpenter Carpenter]], [[Creator/JohnWaters Waters]], Henenlotter....
* NumberedSequels
* ReallyGetsAround: Mary-Lou when she was still alive, which ultimately led to her jealous boyfriend Billy accidentally killing her.
%%* ShowerScene
* StuffedIntoALocker: Monica is stuffed in a locker, then crushed inside.
* TheVamp: Mary-Lou was an evil bitch even before she died; killing her just gave her a power boost.
* XMeetsY: ''Film/{{Carrie|1976}}'' meets ''Franchise/ANightmareOnElmStreet''.