[[caption-width-right:284:Needless to say, the title comes from a sarcastic line in the movie.]]
Little Sweetheart is a 1989 film [[FilmOfTheBook very loosely adapted from a novel]], starring John Hurt, Karen Young, Ellie Raab (who hasn't done any acting work besides playing a blow-up doll since the 1990s) and Cassie Barasch, who, as far as IMDB knows, only ever was in this film (which is kinda odd for a child actress playing the main character).

John Hurt's character, Robert Burger, is a former bank employee who, after robbing his place of work, ran off with his mistress, Dorothea (Karen Young). They arrive in a small Texas beach town on the same day as a family who have a daughter, Elizabeth (Ellie Raab). Elizabeth quickly becomes friends, after being forcibly introduced by her father, with Thelma (Cassie Barasch), a local girl with a dead father, a photographer brother who is screwing a local house-cleaner and a mother who is as good at paying attention to her kids as Casey Anthony. Thelma is a fan of old B movies, rock n roll and violent news stories.

While nowadays she would just become an internet reviewer, there was no internet in 1989. Thelma and Elizabeth end up meeting Robert and Dorothea, and while Dorothea is paranoid and distrusting, Robert quickly befriends the two girls. This is a huge mistake. The two girls end up guiding them to their rental house (this being pre-PaedoHunt, nobody sees a problem with young girls getting in a stranger's car). After Robert tells them that Dorothea is his wife, Thelma points out to Elizabeth that Dorothea is not his wife, as she lacks a wedding ring (he has one, though). That night, they try to spy on them, but get caught.

The next day, at Thelma's ninth birthday party, which a fair portion of the extremely small town is at, Robert shows up and tries to not only trick Thelma into thinking he's secretly a secret agent, but bribes her with a camera, which she had said she wanted. This is one of the biggest mistakes in the history of John Hurt characters. From there, [[FromBadToWorse it just keeps on going downhill]].

The film is little known, though it aired on Creator/TheBBC at least once, and it's now on Netflix.
* AdultFear: In droves. [[spoiler:Elizabeth goes missing (due to attempted murder), her clothing is found on the beach.]] Both Elizabeth and Thelma are associating with strangers, who turn out to be criminals. Thelma is a unique adult fear: the fear that your child is going to turn out to be a monster. And the fear that only some adults have, kids learning about sex.
* AxCrazy: Thelma has absolutely no qualms with murdering even her best friend to get what she wants or ForTheEvulz.
* AmoralAttorney: [[spoiler:Mentioned by the cops after killing Robert]].
* ArtisticLicenseBiology: [[spoiler:Elizabeth. So, you've just taken a bullet to the arm, a bullet to the gut and then spent at least several minutes face-down in either the Pacific or the Gulf of Mexico. A band-aid to the head is all you need!]]
* TheBadGuyWins
* BigBrotherBully: Inverted. The big brother is easily lorded over by his blackmailing little sister.
* {{Blackmail}}: The entire plot is about blackmail.
* BreakTheCutie: Elizabeth.
* CaliforniaDoubling: The film is filmed in Florida, but set in Texas.
* TheChessmaster: Thelma.
* ChildrenAreInnocent: Not just averted, but beaten into submission.
* ConsummateLiar: Thelma. She tricks pretty much everybody right up to the end of the film. Even after he's been tricked by her many times before, Robert is '''still''' able to be tricked by her.
* CorruptionOfAMinor [[CorruptionByAMinor by a Minor]]: Thelma, a psychotic, sociopathic 9-year-old, turns Elizabeth, a normal 9-year-old, into her spying and blackmail accomplice.
* CreepyChild: Thelma, again. One may also see Elizabeth this way.
* CuteAndPsycho: Thelma.
* DevilInPlainSight: Seriously, Thelma's just creepy in general, and seemingly nobody but Dorothea can tell.
* TheDogBitesBack: Robert tries to do this, but gets the wrong person.
* EnfantTerrible: Thelma.
* EvilVersusEvil: It's a bank robber and cheater vs. a psychotic little girl.
* HopeSpot: [[spoiler:Elizabeth is still alive, but then again, the police are hardly going to want to have to deal with the fact they killed an unarmed bank robber, not a murderer, and who's going to believe her?]]
* IronicEcho: After Thelma [[spoiler: decides to kill Elizabeth]], Elizabeth tries to talk her down by saying that they're friends. Cue Thelma purposely invoking this trope, as Elizabeth had said they weren't friends after the last time [[spoiler:Thelma pointed a gun at her]].
* ItsAllAboutMe: Thelma, for the millionth time.
* InsistentTerminology: Thelma is not "kid", she's Thelma, and she will remind you of this.
* KarmaHoudini: Thelma. For a nine year old who tricked the police, blackmailed and robbed two people, [[spoiler: got one killed by the police to shut him up, tried to kill her only friend]] and blackmailed her brother, she gets ice cream.
* KickTheSonOfABitch: Thelma to Robert and Dorothea.
* KidsAreCruel: Thelma. Elizabeth is a borderline example, but only due to Thelma.
* KidsVersusAdults: Scaled down, but still present.
* LackOfEmpathy: If you hadn't guessed, Thelma.
* LittleMissBadass: Thelma, of course. [[spoiler:Her aim is horrible, but she still manages to shoot Elizabeth twice.]]
* LonersAreFreaks: Thelma again. She mentions that Elizabeth is her only friend, and seems to prefer watching TV over most other things.
* MagicSkirt: Averted.
* ManipulativeBastard: Really, does this even need to read "Thelma" before you know that, once again, it's Thelma? She's just as good at manipulating emotions as people.
* MistreatmentInducedBetrayal: Elizabeth. [[spoiler:Nobody likes having their "friend" aim a gun at them.]]
* TheNewRockAndRoll: Being 1989, an elderly side character switches a music video of a rock star and switches to a televangelist.
* NoNonsenseNemesis: Thelma [[spoiler:will shoot you if you're ruining everything. Or get you shot by the cops.]]
* PaedoHunt: Averted. No one seems to blink at a grown man giving an expensive camera to a young girl he just met.
* PayEvilUntoEvil: Robert tries to do this to Thelma.
* RedemptionEarnsLife: [[spoiler:Elizabeth survives getting shot in the arm and chest, as well as being face down in ocean water for several minutes... somehow]].
* RewardedAsATraitorDeserves: [[spoiler:Elizabeth, or not as the last few seconds show.]]
* ShoutOut: A visual shout out, one of the many sets of sunglasses the girls own are [[Literature/{{Lolita}} heart-shaped glasses]].
** Thelma watches many B movies, including ''Film/NightOfTheLivingDead1968'', which seems to be airing extremely out of order.
* TheSociopath: Thelma.
* {{Tagline}}: ''"She's spying on two strangers, she's about to murder her best friend and she's only 9 years old!"''
* TitleDrop: Given sarcastically by Robert (John Hurt).
* TroublingUnchildlikeBehavior: Spying, blackmail, watching people have sex in real life, [[spoiler:attempted murder, murder-by-cop]], [[ArsonMurderAndJaywalking and watching B horror movies and rock music videos]]. Oh, and watching porn.
* UnexplainedRecovery: [[spoiler:Elizabeth, you got shot twice and then were face down in the ocean for at least five minutes, seeing as the fishing boat isn't a speed boat and was far away. How the HELL are you not dead?]]
* VillainProtagonist: All four of the main characters are criminals, but Thelma takes the cake by being the main character and the most evil.
* WiseBeyondTheirYears: Thelma. She's much better at planning crimes than most normal criminals (certainly better that the standard criminals she's dealing with) and is one of the few villains who will just kill you if you get in the way.