You only have a couple of pages to finish and the book is about to end... Or there are only few minutes left from the screen time of the movie... Or you are pumped for this sit-com rom-com season finale. Aww, look! The guy and his crush are finally together. Their unresolved sexual tension is getting resolved. After all that Will They or Won't They? we are happy to find out that They Do after all. Or perhaps the sweethearts made up after their Second-Act Breakup. Perhaps the girl unsure about her Arranged Marriage has finally decided to go through with it. And look, the happy couple is even tying the knot.
Wedding... perfect Happily Ever After, right? Wait, what? It is not them who are getting married! These wedding bells are for somebody else.
Turns out the happy occasion is being thrown for the Beta Couple or any other couple who is close enough to the assumed lovebirds. They are family or friends — close enough to be their wedding guests. Who we assumed were bride and groom are only members of the wedding party, possibly best man and maid of honour or official witnesses to certify the ceremony, which explains their festive clothes or almost-bride-and-groom attire.
Simply put, viewers or readers have been tricked with a Bait-and-Switch trope. In filmed visual media, this trope will usually make use of the Reveal Shot when the camera goes slowly off the assumed couple, shifts the view and pans on the true bride and groom. Alternatively, the actual bride and groom will look a lot like the assumed bride and groom, so much so that they will be mistaken for them at the first glance, or the couple will be shot from behind as they walk up the aisle, obscuring their faces. Another common device is to switch from something like The Big Damn Kiss to an establishing shot of a church, with a crowd waiting to greet the newlyweds, and the reveal is made when the other couple emerges from the doors instead.
Generally speaking, this trope is usually connected to the Official Couple, but it can also concern any other couple from the ensemble cast. The important part is that the audience is led to believe that somebody is about to be married, but they are not really.
Usually an Ending spoiler trope and usually played for laughs. Often used to subvert Fourth Date Marriage — in cases where it would be silly for our only-just-met/only-just-got-together central couple to be getting married themselves, we can be teased with that possibility, while still getting a schmaltzy happy ending and confirmation that they're enough of an established couple to be invited to weddings together.
SPOILERS AHOY! Beware, major spoilers are unmarked.
- Madagascar: Escape 2 Africa: The film ends with Alex's father Zuba officiating a wedding ceremony. The audience is led to believe it's between Melman and Gloria, who confessed their love during the film. Turns out the ones getting married are instead Skipper the penguin and Lola, the bobblehead hula doll from the plane.
- Bad Girl: A spin on this has the heroine getting helped into a wedding dress as she talks about how nervous she is. "Here Comes the Bride" plays, she steps out of the changing room—and she joins a line of women all wearing wedding dresses. She is actually modeling a wedding dress at a department store.
- Bridget Jones: At the end of the second movie, Bridget asks Mark to take her back. Mark does, he proposes and she happily accepts. One of the final shots of the movie has them standing in front of the altar... Except the wedding ceremony is for Bridget's parents who are renewing their vows. At least Bridget catches the bouquet.
- At the end of Clueless, after Cher and Josh get a Relationship Upgrade, Cher's narration says that the viewer can probably guess what happened next. The scene then cuts to a wedding... but it's not theirs. The bride and groom are the teachers Cher has been matchmaking throughout the film and she berates the viewer for thinking the former.
Cher's narration: As if! I'm only 16. This is California, not Kentucky.
- The Love Bug (1997) ends with a photo shoot of bride and groom in Herbie. They vaguely resemble the main couple. At least the main couple is about to leave on a date. They don't know where they're going; Herbie will decide, just like the honeymoon at the end of the original movie.
- Summer Spent with a Cowboy (original title Leto s kovbojem): Honza proposes to Doubravka in front of her disapproving mother, grandmother and great-grandmother, who all answer in turn: "Never!" — "Never." — "Never?" The bride-to-be doesn't say anything. Next shot of the film is at the wedding, Doubravka and Honza stand together side by side. She's in a white simple dress, he's in a black suit, the wedding music is playing... Turns out the groom is Honza's brother who is marrying his girlfriend. Honza and Doubravka are their witnesses.
- Saturnin: The book ends with the nameless narrator nervously asking out his crush Miss Barbora. She doesn't make it easy for him, but she accepts and he's beyond happy. All previous chapters have a summary of the chapter, in the 'In Which a Trope Is Described' style. The very last chapter is very brief (One-Paragraph Chapter brief) and resembles just the summary. The narrator says he knows that every good story needs a satisfying ending and that there is no happy ending like a wedding. Everyone expects it's him and the lovely Barbora. He's glad he will not disappoint his readers because his widowed aunt Katerina got married to a rich gentleman.
- In The Westing Game, Angela spends the book unsure about her upcoming marriage to Dr. Deere. At the end, all of the characters attend a wedding implied to be theirs until it's revealed to actually be for Otis and Crow, as Angela had called off the engagement. (It is stated that she does marry Deere later, but on her own terms.)
- At the end of Mort, the dialogue from Cutangle, coupled with the fact that he clearly has a crush on Princess Keli, implies they're about to get married... nope. It's Mort and Death's (adopted) daughter Ysabel who tie the knot.
- In the live-action adaptation of Saturnin, Jiri Oulicky (the protagonist narrator from the book Named by the Adaptation) has a date with Barbora near the end of the TV film/miniseries and proceeds to narrate that he knows every good story ends with a wedding. The scene is set at church, Lohengrin and Mendelssohn is playing, the camera pans to Barbora and Jiri standing before the altar... but as the first couple among the wedding guests. The bride is actually Jiri's gold-digging aunt Katerina.
- In How I Met Your Mother, the entire final season takes place at Barney and Robin's wedding. However, the prior seasons faked out the identity of both the bride and the groom when they had flash forwards to the time of the final season.
- Season 6 opens with Ted talking about the two important days in a relationship: the day you meet a girl and the day you marry her. Cut to Ted in a tuxedo and Marshall approaching him and asking if he's nervous. The implication here is clearly that this is Ted's wedding day and that he's marrying the mother of his kids. The season finale reveals it's their friend Barney's wedding and Ted's nervous because of his best man duties.
- Season 7 ends with Barney (already revealed to be the groom) proposing to his girlfriend, Quinn. However, the very last scene reveals the bride to not be Quinn, but Robin, Barney's ex-girlfriend (and also Ted's ex-girlfriend and big love of his life).
- A comedic example in Series 2, episode 4 of Derry Girls. The episode begins with single mother Sarah walking down the aisle in a white dress, apparently getting married at last. However, a pan-out reveals that she is actually a guest at a relative's wedding, and committed the fashion faux-pas of wearing white.
- "I Was There" by The Statler Brothers begins by describing an adolescent romance between the singer and a neighbor girl that seems to be heading to the altar. And on the wedding day, the singer takes his place ... with the friends of the bride.
- "Marry Me" by Thomas Rhett. The song sounds like it's setting up a wedding between the narrator and his lover... until the line "She wanna get married, but she don't wanna marry me" reveals that she's dumped him for someone else.
- The Order of the Stick: "Dream Wedding". The villains are defeated, the heroes get a happy ending, and Elan prepares for a wedding. His wedding to Haley, right? No, it's his divorced parents getting re-married - an event so improbable, it causes Elan to realize that he's trapped in an illusion and none of these events actually happened, up to and including defeating the villains.
- A 2015 story arc in Dork Tower has The Bus Come Back for Gilly the Perky Goth, who's talking about marrying someone in three days and having to write vows, but never actually mentioning the groom. It turns out she's officiating at her brother's wedding.
- In the "Where Are They Now?" Epilogue of the Dragons: Riders of Berk series finale, the riders are all attending Dagur and Mala's wedding, the framing and Hiccup's voiceover implying it to be his and Astrid's wedding before panning out and proving otherwise.
Hiccup Horrendous Haddock III: As for the lovebirds... [Shows Hiccup and Astrid kissing with a pair of wedding rings, only to reveal Dagur and Mala putting on the rings instead] No, those lovebirds.