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Anime & Manga
- One Piece has Igaram and his wife Terracotta, to the point some of the Straw Hats accused Igaram of being into drag. Zoro lampshades this.
Zoro: A couple can only look so much alike!
- Bleach: Possibly the reason Rukia Kuchiki and her brother Byakuya somewhat resemble each other, despite not being blood-related—she's his deceased wife Hisana's younger sister, and the two look almost identical apart from Hisana having slightly wispier hair.
- A gag yonkoma from Eyeshield 21 sees Munakata of the Amino Cyborgs shows a fellow teammate the familial resemblance between father, child and mother. His teammate is rather unnerved, and Munakata encourages him not to think about it too much.
- A natural trait of a certain race in I Wish, who begin to assimilate themselves to their target of affection, often ending with them looking very similar to their beloved.
- In Yu-Gi-Oh! 5D's, Jaeger, the guy who looks like a gay clown, has a wife and a son◊ who look exactly like him, just with different hair colors.
- One chapter in Otomen features Yamato asking out one of Juta's sister, whom Asuka thinks looks very much like him. Later subverted, since she doesn't reciprocate and started going out with Kurokawa instead.
- In Ranma ½, both Hikaru Gosunkugi's parents look a lot like their son, having the exact same sunken eyes with dark spots underneath, being rather gaunt and black-haired too.
- Sharon Carter and her aunt Peggy are both this to Steve Rogers, as all three have blond(e) hair and blue eyes.
- Invoked as part of the power set of X-Men character Benjamin Deeds (aka Morph) — his powers are an odd mix of shapeshifting and empathy which mean that the longer he spends in anyone's presence, the more he will grow to physically resemble them, and the more they will like him. In other words, if anyone does fall in love with him he will be their lookalike — whatever they look like.
Films — Live-Action
- One of the love interests in Le Samouraļ was cast because the actress looked like she could be Alain Delon's sister and the director wanted the audience to feel that awkwardness between them. What makes this particularly weird is that said actress was Alain Delon's wife.
- In the Divergent movie adaptation, Four and Tris looks somewhat similar to each other.
- In the Divergent Tris was a short waif-looking Plain Jane girl with light blond hair and striking steel blue eyes while Four was tall, dark and handsome with beautiful blue eyes of his own and the only similarity in their looks physically; complete opposites in looks. However, the character Tris Prior not only received an Adaptational Attractiveness when Shailene Woodley was casted to play her opposite to Theo James who portrays Tobias "Four" Eaton but they look somewhat similar with the physical coloring and height.
- Neo and Trinity in The Matrix trilogy look very much alike, both with pale, androgynous faces and short black hair. This leads to some confusion for the audience during their sex scene in the second movie where it's hard to tell exactly whose ass you're looking at.
- In Requiem for a Dream, Marion and Harry look like they could be siblings. They are both dark haired, androgynous, with similar features. Even their profiles look alike.
- Completely inverted in one Agatha Christie novel The Moving Finger: When every villager starts receiving hate mail, the main character (who lives with his sister) is accused of being unmarried lovers masquerading as brother and sister. They don't look anything like each other (as each takes after one very different parent), hence the accusation.
- Inverted in A Song of Ice and Fire where Cersei and Jaime Lannister are Half-Identical Twins and look very alike—but most people don't realize they are also lovers. They have kids, and yes, they do look like both of them. Their father, Tywin, married his cousin Joanna, and they were presumably an example as well, which also helps explain why the twins look so much alike.
- The Van der Veghels in Ngaio Marsh's When In Rome look suspiciously similar. Alleyn suspects, but cannot prove, they are in fact half-siblings. What's more, he suspects blackmail on this point prompted the husband to commit murder.
- Sarah and Silas Heap in Septimus Heap both share Green Eyes and curly blonde hair with their children.
- Harry Potter: Kind of justified, as both of the couples below are pureblood, and thereby a little inbred.
- Lucius Malfoy has a pale, pointed face, with pale blond hair and cold grey eyes. His wife Narcissa is described as tall, slim, "nice looking", and very pale, with blue eyes, and long blonde hair. (Her hair colouring thus differs from most of the House of Black, who generally have dark hair.)
- Arthur Weasley and his wife Molly both have bright red hair and probably freckles as it is a family trait.
- The light novel version of Durarara!!!! have this with Ruri and Kasuka, both of whom have pale skin, dark hair and a similar stoic demeanor. Their relationship initially starts off as being for show, but grows into a genuine affection later since the two have far more in common than either initially realize.
- Variant in Charlie and the Chocolate Factory, where an inordinate number of men are married to women with the feminine version of their name. Joe and Josephine, George and Georgina, etc. In the 1971 movie, Veruca Salt's parents are named Henry and Henrietta.
- Neuromancer has the Magnetic Dog Sisters, an apparently a heterosexual couple of heavies who had extensive plastic surgery to look alike.
- An example of a Deconstruction that isn't grim or dark occurs on 30 Rock, where Jenna Maroney begins a long-term relationship with a Drag Queen who works as a Jenna Maroney impersonator because she's so vain that she wants to make out with "herself".
- In Selfie Henry and his girlfriend Julia don't exactly look alike-she's tiny and white, he's 5'10 and Korean, but they dress alike (even before they start dating) and even have somewhat similar hair. They also have similar personality traits, for the most part.
- Sheldon and Amy on The Big Bang Theory.
- An episode of 2 Broke Girls has a couple of bears who even have the same facial hair.
- Buffy the Vampire Slayer:
- Willow and Oz/
- Also Buffy and Spike — both are petite blondes with sharp facial structure, full lips, light eyes and a tendency to wear garish nail polish, combat boots and long trench coats.
- One episode of CSI involved an intentional evocation of this trope (or something) when it's revealed that to lure a man who is a little person out a fake woman was created using a photo of the man himself that was slightly altered so he wouldn't notice. It's explained that this was successful because people are attracted to people with similar features to themselves.
- On The Drew Carey Show, Oswald is contacted by the son of an old girlfriend who believes Oswald to be his father; however, the guy looks just like Lewis, who admits to having a fling with the mom. Oswald objects that the guy doesn't look like Lewis, he looks like his mom, leading to this exchange:
Drew: Creepy — Oswald had sex with someone who looks like Lewis.
Kate: Creepier — Lewis had sex with someone who looks like himself.
- The Unbreakable Kimmy Schmidt episode "Kimmy Googles the Internet!" features a married couple, both members of which are played by Rachel Dratch.
- The Winston Rowntree comic 4 types of husbands and wives has this as one category "the you with longer hair".
- In Questionable Content, when Dora dyes her hair black, she looks a lot like Marten. In a non-canon guest strip Tai turns all the men in Northampton into women and Dora and Fem!Marten immediately start making out.
- In The Mansion of E, Amos and Nellie are an elderly couple who look a great deal alike.
- One of the "Dating Problems Every Lesbian Will Recognize" in the Buzzfeed video of the same name.
- Twisted around a little by The Nostalgia Critic and The Nostalgia Chick who have a similar aesthetic (pink pouty lips, large green eyes, Hollywood Pudgy, pale, dark hair, often wear glasses). She won a contest created by him to be his Distaff Counterpart, and they might not be a standard couple, but they own a complicated sexual history.
- The Simpsons:
- Pictured above: Milhouse's parents look so similar to each other, their own son is half-sure they're brother and sister. A later episode however has Milhouse state that they are cousins.
- Same case with Ralph Wiggum's parents, Chief Wiggum and his wife, Sarah (albeit not to the extent like the Van Houtens).
- If we look at the extended family, Ned Flanders's male relatives all look alike—and their wives all look like Maude.
- Ralph the security guard and his wife in Animaniacs. Their son, who looks nothing like them, desperately hopes that he is adopted.
- Family Guy Mort's wife Muriel, who looks just like Mort if he was in drag.
- This trope happens in a relative sense in The Amazing World of Gumball: Elmore is full of all kinds of Funny Animals, plants, and Animate Inanimate Objects that are subject to all kinds of Medium Blending, and Interspecies Romance isn't treated as unusual; the main character's parents are a cat and rabbit. But most of the other married couples we see are of the same medium, artstyle, and species (e.g. Penny's parents are both peanuts with Thick-Line Animation like her, Mr. and Mrs. Robinson are both CGI pseudo-Muppets, Banana Joe's parents are both CGI bananas, and Sussie's parents are both live-action chins). Lampshaded in "The Recipe", as Gumball sees Anton's parents (who are off screen) and assumes they are both clones of Anton wearing a hat and dress, respectively, that just kissed each other.
- Codename: Kids Next Door: All the parents of Sector V's members look exactly alike in spite of the fact that we can't see their faces.
- Arthur: A majority of the kids' parents are this, the only notable exceptions are Brain and Sue Ellen's parents.
- It's actually proven that people are attracted to someone who looks vaguely similar to them, be it physically or mentally, through a process called Assortive Mating. The theory is that this is an evolutionary instinct designed to help find people whose genes will work well when combined with their own. This also possibly helps explain some real life instances of genetic sexual attraction where siblings separated in early childhood wound up dating when they unknowingly met again as adults, since they experienced this trope without the Westermarck Effect from being raised together to cancel it out.