[[quoteright:300:[[Film/TheRundown http://static.tvtropes.org/pmwiki/pub/images/walken_5532.jpg]]]]
[[caption-width-right:300:[[Creator/ChristopherWalken In the role]] [[TypeCasting of a lifetime]].]]

->''"What matters in that kind of role is not how many lines you have, but how few. What counts is how much the other characters talk about you. Such a star vehicle really is a vehicle. All you have to do is ride."''
-->-- '''Creator/OrsonWelles''', explaining this trope and his own success in ''Film/TheThirdMan''

A character that has [[OneShotCharacter limited screen time]], and usually not much in the way of plot relevance, but is still one of the most memorable things in the movie. [[BillingDisplacement They may even be given top billing]], or at least an "AndStarring" credit, along with the more obvious stars.

This is not the same principle as EnsembleDarkHorse, because the character is often played by an established actor, nor is it the same as DeadStarWalking, because the intent is not to fool you into thinking that the actor will appear more often. The character just appears, gives a show-stealing performance, and then is gone. Like a SpearCarrier, only way more righteous. Like a {{Cameo}}, except you don't have to recognize the actor to appreciate the scene for all it's worth. You know you're dealing with this sort of character if you start referring to "their scene."

Many characters of this type will be clergymen of some kind, particularly in comedy. A good reason this works is because of TheVicar principle, and because clergymen are really only needed for [[WeddingDay wedding scenes]] anyway. The character type needn't be played for comedy, but frequently is. Often a LargeHam.

A one-scene wonder that's very weird and out of place results in a BigLippedAlligatorMoment.

Also see KentBrockmanNews. Compare HamAndCheese, SpotlightStealingSquad, and SmallRoleBigImpact. {{Fanfic}} authors are prone to make characters like this into {{OC Stand In}}s. If the character becomes so popular that the writers decide to come up with an excuse just so be able to use him again, he's an AscendedExtra.

If the movie is particularly bad, the One Scene Wonder may be [[AllThereIsToKnowAboutTheCryingGame the only thing remembered about it]], or indeed [[JustHereForGodzilla the only reason anyone watches it]]. When a minor character in a musical does this through the use of one fantastic song, it's MinorCharacterMajorSong.

* OneSceneWonder/AnimatedFilms
* OneSceneWonder/AnimeAndManga
* OneSceneWonder/ComicBooks
* OneSceneWonder/{{Literature}}
* OneSceneWonder/LiveActionFilms
* OneSceneWonder/LiveActionTV
* OneSceneWonder/{{Music}}
* OneSceneWonder/{{Other}}
* OneSceneWonder/{{Religion}}
* OneSceneWonder/{{Theatre}}
* OneSceneWonder/VideoGames
* OneSceneWonder/WebComics
* OneSceneWonder/WebOriginal
* OneSceneWonder/WesternAnimation

->''"ItsAllAboutMe, it's all about me,''\\
''It doesn't matter where I'm listed on Website/{{IMDb}}''\\
''And if I had the screentime I deserved, you'd see--''\\
''It's all about me!"''
-->-- "All About Me", ''WebVideo/CommentaryTheMusical''