History Main / CannotKeepASecret

* ''WesternAnimation/{{Sixteen}}'': Given her gossipy nature, if somebody tells Caitlin a secret, it is almost guaranteed that she will spill it. She told her GuyOfTheWeek all of the gang's most embarrassing stories in "Pillow Talk" after promising to keep the stories only among the group, and she reveals Jude's secret girlfriend Melinda to the gang in "Silent Butt Deadly".

* Marie from ''Series/BreakingBad'' is a world-class blabbermouth.

** It's also a RunningGag that Arthur's best friend Buster just ''cannot'' keep a secret -- whenever Arthur tells him a secret, he'll promise to keep it and then promptly loudly inform the person closest to them that he's got a secret to tell them. When Arthur is ''[[ImStandingRightHere still standing right there]]''. It's so bad that in "Blabbermouth", [[SurprisinglyRealisticOutcome no one can rely on Buster to keep a secret]].

* ''VideoGame/Persona5'' has Ryuji, a member of the phantom thieves, whose identities are meant to be obscured and unknown. Multiple times, Ryuji almost gives away that the phantom thieves are real and he is one... [[spoiler:and actually ''does'', which Makoto manages to record and use to blackmail him]].

* Henya the Genius of WebVideo/VShojo had a history of online activity prior to her debuting on the agency, but like with many high-profile [[VirtualYoutuber Vtubers]], she tries to keep it as private as possible[[note]]Among Vtuber culture, it's widely considered bad manners to dig up information on the "real" person behind [[{{Kayfabe}} their aliases and the characters they present as]], [[OpenSecret even if the information is publicly available and easy to access]]. Unless the Vtuber in question is open about it, acknowledging their "past life" is generally a no-go[[/note]]. Unfortunately for Henya, she's been known to have an especially hard time keeping it a secret due to several of her signature quirks (including her voice, [[SignatureLaugh her laugh]], and several involuntary {{verbal tic}}s), and it's so bad even ''her friends'' make the slip-up for her (especially [[WebVideo/KsonOnAir Kson]], whom Henya has history with before and after her debut). Very quickly after building herself up in [=VShojo=], Henya [[SelfDeprecation admitted to having probably the worst-kept secrets in the business]], but still requests they be recognized and treated ''as'' secrets.

* DoubleSubverted in ''Manga/TheRedRangerBecomesAnAdventurerInAnotherWorld''. Red says that he tried to keep his SecretIdentity a top secret, instructing the other members of the Kizuna Five to do the same. Idola is flabbergasted at the thought of someone as straightforwardly honest as Red keeping a secret that important, only for Red to cheerfully admit that he was exposed a week after becoming a {{Sentai}} hero.

* Creator/TomHolland is so bad at not leaking spoilers for the Franchise/MarvelCinematicUniverse that the producers resorted to removing all the scenes [[Franchise/SpiderMan his character]] is not in from his script for both ''Film/AvengersInfinityWar'' and ''Film/AvengersEndgame''. They also had Creator/BenedictCumberbatch co-interviewing with him for nearly all of his press tour promoting both movies to help rein in the spoiling. His tendency for this got [[LampshadeHanging lampshaded]] when the producers had him appear at the beginning of the second trailer for ''Film/SpiderManFarFromHome'' and tell the audience that the trailer contained spoilers for ''Endgame'' so please don't watch it if they haven't seen that movie first.

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[[quoteright:232:[[Webcomic/TheOrderOfTheStick https://static.tvtropes.org/pmwiki/pub/images/secret_0.png]]]]

* Henya the Genius of WebVideo/VShojo, had a history of online activity prior to her debuting on the agency, but like with many high-profile [[VirtualYoutuber Vtubers]], she tries to keep it as private as possible[[note]]Among Vtuber culture, it's widely considered bad manners to dig up information on the "real" person behind [[{{Kayfabe}} their aliases and the characters they present as]], [[OpenSecret even if the information is publicly available and easy to access]]. Unless the Vtuber in question is open about it, acknowledging their "past life" is generally a no-go[[/note]]. Unfortunately for Henya, she's been known to have an especially hard time keeping it a secret due to several of her signature quirks (including her voice, [[SignatureLaugh her laugh]], and several involuntary {{verbal tic}}s), and it's so bad even ''her friends'' make the slip-up for her (especially [[WebVideo/KsonOnAir Kson]], whom Henya has history with before and after her debut). Very quickly after her debut, Henya [[SelfDeprecation admitted to having probably the worst-kept secrets in the business]], but still requests they be recognized and treated ''as'' secrets.

-->'''Nurse:''' Doctor...are you trying to tell me that Thomas Edison is in the broom closet next door?\\

-->'''Nurse:''' Doctor...are you trying to tell me that Thomas Edison is in the broom closet?\\

* Leni Loud of ''WesternAnimation/TheLoudHouse'' is ditzy and a DumbBlonde, so she is very bad at keeping secrets. She's been shown to spoil surprise parties, TV show endings, and Secret Santas. "No Spoilers" focuses on this very trope; her siblings try to keep her distracted as long as possible while they plan their mom's birthday party so she can't spoil it.

* In ''LightNovel/FateApocrypha'', Rider of Black/Astolfo constantly blurts out sensitive information like Servants' True Names and Noble Phantasms, much to the Black Faction's annoyance. This carries over into his appearances in ''VideoGame/FateGrandOrder''.

--->'''Mrs. Park:''' (about a fur coat) It was a gift from Mr. Park when he forgot our 20th.
--->'''Pastor Nina:''' I remember those counseling sessions. (Mrs. Park glares at her) Oh, you brought it up so I thought we were just going with it.

-->'''Kramer:''' You listen to me. You don't tell anybody about this. No one! You hear me?
-->'''Jerry:''' Mmm-hmm.
-->(George comes in)
-->'''Kramer:''' Hey. Jerry shaved his chest!
-->'''Jerry:''' HEY!
-->'''Kramer:''' I forgot. NEVER MIND!

* In ''Manga/HajimeNoIppo'', pretty much every member of the Kamogawa gym is like this. Every time Ippo tells a fellow member to shut it about something he will do (like a date with Kumi), the whole gym knows the day after. Itagaki is the most notable offender of this though: not only does he tell [[KnightTemplarBigBrother Mashiba]] the details of the relationship between Ippo and Kumi, but when the same Mashiba tells him a secret of his own, while Itagaki swears to keep it we see a panel showing how impatient he is of telling everyone at the gym!

* ''Literature/AscendanceOfABookworm'': The only secret Myne can be guaranteed to keep is the exact source of her knowledge. Just about everything else can fall victim to the fact that she has no brain-to-mouth filter when enthusiastic or deep in thought. Unfortunately, carelessly sharing information becomes more and more dangerous as she climbs up the social ladder, resulting in Myne's mentors constantly having to remind her to watch what she's saying and in whose presence she's saying it.
* Lori has this trait in the ''Literature/AuntDimity'' series; this trope is frequently invoked and only partly PlayedForLaughs. This trait is one of those that make her suited to the village gossip hive that is Finch. It's also the reason Bill doesn't tell her where he's sending her and the kids to escape the stalker at the opening of ''Aunt Dimity and the Deep Blue Sea''. As it turns out, she's not the one to give that game away; [[spoiler: Sir Percy makes an airy remark about taking her over Gretna Green with the stalker literally hiding in the bushes, so he knows they're going to Scotland and follows them there]].

* ''Series/{{Cheers}}'': In "Truce or Consequences", Carla confides in Diane, only for Diane to turn around and blab the secret to Coach less than 24 hours later. (Well shy of the purported 47.) Of course, it turns out [[spoiler:the secret was a huge lie in the first place.]]
* An entire episode of ''Series/CornerGas'' revolved around Brent and Lacey competing to see which one of them is a better confidant.

** When Joey was throwing a party for the cast members of his soap opera on the roof, he didn't tell the others due to them gaining [[TookALevelInDumbass multiple idiocy levels]] around celebrities (Rachel being the worst of them). After he concedes to allow Rachel to attend the party, she almost immediately heads across the hall, and basically tells the others "He didn't want me to tell you, so I came over here to tell you guys."

* ''Series/SaturdayNightLive'': One recurring series of sketches features Creator/KristenWiig as Sue, better known as the "Surprise Lady." In each sketch, someone gathers a group of people, including Sue, to announce some exciting news -- like someone getting a promotion, a couple revealing that they are pregnant, or a soldier visiting his family for Thanksgiving -- and explains that they plan to spring the information as a surprise. Unfortunately, Sue has a borderline fetish for secrets and is often forced to go to extreme lengths, including stuffing an entire pillow in her mouth or cramming herself inside a vending machine, just to keep her mouth shut. When she comes dangerously close to cracking, she usually ends up [[ThereWasADoor violently exiting the scene]] by leaping out of a window or climbing up a chimney.
* Averted in ''Series/{{Scrubs}}''; Carla usually can't keep secrets, but when Eliot loses her job at another hospital, she manages not to tell Turk and J.D. about it. Of course, they can tell she knows ''something'' ... so she tells them she's keeping the secret that Eliot smokes a pipe.

* ''Literature/TheBible'': "He who goes about as a talebearer reveals secrets; therefore do not meddle with him who flatters with his lips." ([[Literature/BookOfProverbs Proverbs 20:19]])

** Pinkie Pie -- a MotorMouth and {{Cloudcuckoolander}} extreme -- surprisingly averts this trope in a later episode, "The One Where Pinkie Pie Knows." She's tasked with keeping a huge secret--that Princess Cadence and Shining Armor are going to be parents--and spends the entire episode trying (and failing) to avoid situations that might tempt her to blab. Pinkie comes dangerously close to cracking several times, but manages to hold in the news until it is officially revealed (though the pressure literally [[VisualPun breaks her apart]] in the end).

** The episode "Lisa Gets An 'A'" has her literally begged by Principal Skinner, Superintendent Chambers, Gil Gunderson and technically Ralph to keep the fact she cheated in a single test a secret so the school will obtain some ''very'' desperately needed additional funding (to make it even more hypocritical she cheated because she wasted the time she could have used to study being obsessed with a ''VideoGame/CrashBandicoot'' Expy and she starts to believe a single bad grade ever will prevent her from going Ivy League). At the climax, it turned out that Skinner knew perfectly well that Lisa wouldn't keep that secret no matter what so he convinced everybody to help put up a fake meeting with the district Comptroller and let Lisa speak out then get her out of the way so they could get the check.

** In ''Island'', Lindsay assures Heather that she can totally keep a secret, right before revealing her sister's most embarrassing secret on international television.

* ''LightNovel/AscendanceOfABookworm'': The only secret Myne can be guaranteed to keep is the exact source of her knowledge. Just about everything else can fall victim to the fact that she has no brain-to-mouth filter when enthusiastic or deep in thought. Unfortunately, carelessly sharing information becomes more and more dangerous as she climbs up the social ladder, resulting in Myne's mentors constantly having to remind her to watch what she's saying and in whose presence she's saying it.