The Real Fake Wedding occurs when someone attempts to trick someone into marrying them by staging a fake wedding with their intended partner (by saying it is for a play, that they need a stand-in for the bride/groom at a wedding rehearsal, etc) then replacing the fake celebrant with real celebrant.
Needless to say, such a "wedding" would have no legal standing in the real world. However, characters in fiction will almost always treat such a ceremony as if it was legally binding.
- In Tomahawk #31, a woman attempts to trick Tomahawk into marrying her by staging the wedding in a play about his life (where she has talked him into playing himself). It fails when the preacher she sent for from Boston turns out to be a bandit in disguise and has no authority to marry anyone.
- In Bodie Troll 2015 Free Comic Book Day issue. While making a delivery, Bodie comes across a girl playing tea party who invites him to join her. He does so, surprisingly getting intoxicated despite the "tea" being root beer, and during one of their games, they do a fake wedding. However, the kingdom they live in has some very oddball laws, one of which allows the wedding to be legal. Luckily Bodie's friends, Cholly and Miz Bijou, find out about the root beer and reveal that the drink has an alcoholic effect on trolls (since rotted roots are their favored food as opposed to sugared roots) and, as such, Bodie wasn't in his right mind at the time to consent to the wedding. Thus getting the wedding annulled.
- The Lady Of Rivers And Storms: Because Hoster Tully is unwilling to be content with a mere betrothal, Lysa marries Stannis Baratheon with Elbert Arryn standing in for Stannis at Ned and Catelyn's wedding. They were supposed to be married in a double wedding with Robert and Lyanna, but Lyanna died and just one couple was married that day.
- At the end of The Muppets Take Manhattan, Piggy and Kermit are supposed to get 'married' at the climax of the big musical. Gonzo was supposed to play the minister but Piggy replaces him with a real minister. (To add to the metatextuality of the affair, the man in question was a real-life Presbyterian pastor.)
- The comic book adaptation has a scene where Miss Piggy asked Gonzo if he'd found a doctor to look at Kermit's amnesia, but Gonzo replies that he found a minister, with no hint that Miss Piggy asked for one.
- In A Series of Unfortunate Events, Count Olaf casts his ward Violet as the bride in his play in a bid to gain full control over her inheritance. Olaf definitely plays this trope straight and casts a real officiant in the play, who is very distressed to learn she had been tricked.
- Inverted in one Sherlock Holmes story, where the groom claims the pastor (and therefore the wedding) was legitimate. Holmes replies that even if the pastor was real (doubtful at best) the forced wedding won't hold up in court.
- On The Office (US), Dwight gets a priest who only speaks German for Andy and Angela's wedding. He does a practice ceremony where he stands in for Andy, and makes the priest believe Dwight's the groom and it's a real ceremony. Angela does not accept it as a real marriage, however.
- One episode of The Drew Carey Show saw Drew impulsively marrying a woman he met in Vegas. He thought it was just a gag (the priest was dressed as Jimi Hendrix), but it turned out to be legally-binding; the woman was stuck in a custody battle with her ex-husband, and hoped that marrying Drew would help her keep her kids.
- In an episode of Fantasy Island two actors with Belligerent Sexual Tension play characters who get "married" during a musical comedy performance. Unknown to them until after the ceremony, the minister is a real minister who was having a fantasy of his own fulfilled (performing in a professional show). Now they really are married.
- In the Marisa Berenson of The Muppet Show episode, Miss Piggy has Kermit agree to participate in a wedding sketch at the end of the show, which is implied to be a real wedding. Kermit escapes by, instead of saying "I do", introducing Lew Zeland and his boomerang fish act, who had earlier lobbied unsuccessfully to be in the show.
- In one episode of Happy Days, Fonzie agrees to be Jenny Picalo's date to a party on a boat, and he agrees to a fake wedding. However, Roger later tells Fonzie that he thinks a wedding ceremony on a boat, even if it's meant to be fake, means that the marriage is legally real. Of course, in this case Jenny had not intentionally tricked Fonzie into marrying her, though she is happy to learn the news. And Roger eventually finds out that he was wrong and they are not legally married.
- Charlie's Angels did this in a Con the Conman scenario. The conman was targeting a mousy, shy woman. The Angels convinced him he could fleece her with a fake marriage. They had Bosley pretend to be the minister so the conman could get the "real" one out of the way. The real minister performed the ceremony and the Angels already knew something the conman didn't. The bride's father was a noted underworld figure who would ensure his new son in-law made his daughter happy.
- In one episode of Hogan's Heroes, the group has to prevent a captured member of the French Resistance from spilling his guts. His captors try to demoralize him by telling him his lover is unfaithful, so Hogan and company trick Colonel Klink into marrying them (reasoning that he has the authority to do so, for the same reasons as a ship captain) under the guise of a play.
- On an episode of Bridezillas one bride decided (against both her and her fiancé's better judgment) that she was going to invite her guests to an "engagement party," and then announce in the middle of it that it was really a wedding. She did manage to pull off the "surprise wedding," but needless to say, this was a logistical nightmare, and involved a lot of lying to family members. (Which did get her called out by her mother, who almost missed the wedding, thinking it was only an engagement party which she was only going to make an appearance at for a short while).
- The Real O'Neals: A variant occurs in the episode where Kenny gets cast as the lead in his school's production of Romeo and Juliet. Eileen gets too into planning the wedding scene of the play, making it seem like a real wedding. When Kenny confronts her about it, she says it's because he'll never have a traditional wedding like she always dreamed of.
- In season 3 of Arrested Development George Michael and his cousin/crush Mabey take part in a fake wedding at the hospital for alzheimers patients, only for a real preist to step in. While it's mentioned in the next episode and is legally binding, it's not mentioned again.
- The pastor in the "Truth or Square" episode of SpongeBob SquarePants thought it was a real wedding instead of a play. A deleted line has Spongebob saying "It doesn't have to be", only to get slapped by Sandy. Since it was a real minister who performed the marriage that was supposed to be for a play, this means Spongebob and Sandy are accidentally married.
- On Total Drama World Tour, the contestants have to fake-marry for the Niagara Falls challenge, and Cody gets stuck with Sierra. In the confessional, she explains that she's an ordained minister on the Internet, and attempts to say the wedding vows really fast and trick Cody into saying "I do." She eventually succeeds, but it's Subverted in the next episode when Heather notes that that's not actually legal.
- On King of the Hill, a prank war erupts between Bobby (who's twelve) and Luanne (his older cousin). After he replaces her birth control pills with candy, she convinces him that women have to take a birth control pill every day or they get pregnant. Hank and Peggy actually get in on the joke and put on a fake Shotgun Wedding, to Bobby's horror. Then, to teach Luanne a lesson too, they claim that the celebrant, Bill, is actually an ordained minister and their marriage is valid. Also, you supposedly can't get divorced in Texas for at least a year.
- The New Mr. Peabody & Sherman Show: Trying to impress her sister, Christine gets Peabody to hold a fake wedding with him on-show, having Mr. Hobson officiate so that it won't count, but things get complicated when an emotional sister insists on officiating the wedding herself which would make the wedding real.
- Winona Ryder joked about possibly being married for real to Keanu Reeves during the filming of Bram Stoker's Dracula, in which their characters Jonathan and Mina Harker were husband and wife.
Ryder: In that scene, [Francis Ford Coppola] used a real Romanian priest. We shot the master and he did the whole thing. So I think we're married.
- In traditional Jewish religious law, if a man hands a woman an object of value (it needn't be a ring) in the presence of two unrelated male witnesses, while saying "Behold, you are consecrated unto me according to the law of Moses and Israel," the two are legally married, even if there's no rabbi involved, and even if done as a joke or as part of a performance. Their only recourse is to obtain a divorce through a rabbinical court.