2-Headed Shark Attack: Professor and Mrs. Banish enjoy working together, look out for each other when things get dangerous, and have a peaceful Last Kiss as they wait for the approaching shark to devour them.
Gomez and Morticia Addams, unquestionably so, in The Addams Family. Love at first sight, the pair regularly get Distracted by the Sexy even with guns pointed at them, and dance together every day. They even bid against each other in an auction as part of their romance, with escalating results. Summed up with this quote:
Gomez: "To live without you, only that would be torture."
Morticia: "A day alone, only that would be death."
All My Loved Ones: Jakub and Irma Silberstein are very happy together and they're loving, caring parents to Hedvika and David. Jakub is a successful medical doctor and his wife is at home, taking care of the house and the children. They also have loving relationships in their extended family, especially with Jakub's brothers.
Assault on Wall Street: Jim and Rosie clearly were deeply in love with each other. This makes it just all the more devastating when he's bankrupted by the crash then can't pay for her treatment. Rosie kills herself after realizing the burden she's become for him.
George and Lorraine McFly were originally not happily married at the start of the series—him being a spineless loser in a dead-end job and her a depressed alcoholic who only married him out of pity—but after Marty's alterations to the timeline, Back to the Future ended with them charmingly in love with each other and their life. Given Lorraine's rant to Biff in the sequel, she and George had been happily married in that alternate universe before Biff had George murdered.
In the third movie, we see that Seamus and Maggie McFly were happily married as well despite the rough life they had on their farm. They were content with each other and their family, and did not see any need for pride or adventure to get in the way.
Doc Brown and Clara Clayton at the very end of Back to the Future Part III. They are time traveling together and show off two children. Their happily married status is expanded upon more in the animated series.
In Baghban all the couples in the movie, but exaggerated for Raj and Pooja. Even though they are married for 40 years, they behave like they are a young couple who are madly in love.
Barbie (2023): Gloria is married and the two have a daughter together. Despite how little we see of her husband, he and Gloria seem very happy together and in love, with her husband, who is played by America Ferrera's real-life husband, even attempting to learn Spanish for her and their daughter.
They may be dead, but that doesn't stop Adam and Barbara Maitland from being this in Beetlejuice. They're quite blissed out on each other, and a real contrast to the grating, saccharine Charles and Delia Deetz as well.
In The Brass Teapot John and Alice are truly happy together and very much in love, despite all their financial difficulties.
The Castle: Darryl and Sal. She cooks, he buys things for the pool room. And they wouldn't have it any other way.
Tom and Kate Baker in Cheaper by the Dozen (2003) and its sequel. They clearly love one another even after twenty-five years of marriage (twenty-three according to the first movie, plus the two that passed between films) and having twelve children. They argue a bit throughout the two films, but they ultimately make up, and are happy with each other.
The parents in A Christmas Story. Not even the legendary "Battle Of The Lamp" can permanently derail them.
Ralphie and his wife Sandy prove to be this in A Christmas Story Christmas, as the two are incredibly loving and supportive toward each other, Ralphie immediately running to her aid when she falls and injures herself, and Sandy having saved enough money for Ralphie to take a year off from work to write his novel.
Ed and Lorraine Warren in The Conjuring Universe are still madly in love with each other after twenty-plus years, and while they have their share of arguments — usually about wanting the other to stay safe instead of running into danger — their love for each other never falters. Their relationship forms the emotional heart of the entire franchise.
Lorraine: I could go back to the house — but my home is here, with him.
Donald and Tim in the Donald Strachey mysteries are this right from the start, and they're adorable. Not that they don't have their problems, particularly with Donald's dangerous and time-consuming line of work, but that's life.
Marge and Norm Gunderson in Fargo. When she's woken up in the middle of the night about a triple homicide, he wakes up alongside her, insisting that she at least needs to eat before heading off to work, so he makes her some eggs. Norm also brings her lunch at work. She brings him earthworms for his fishing and congratulates him for getting his painting on a stamp. At the end of the film, she states thoughtfully, "We're doin' pretty good."
The Finest Hours: The epilogue shows that the marriage between Bernie and Miriam did happen on the planned date, and lasted for 58 years until he died in 2009.
In Ford V Ferrari, Ken Miles is married to Mollie, and have a son named Peter. Mollie supports Ken's racing career and seems to share his knowledge and interest in cars. Their relationship is harmonious, save for a brief moment when Mollie is upset that Ken wouldn't tell her about meeting up with Carroll Shelby to test the car they just acquired.
Bick and Leslie in Giant may have their disagreements - mostly because Bick's traditional Texan attitudes toward race and gender roles clash with Leslie's more progressive, egalitarian ideas - but they remain devoted to each other.
Celia and Johnny in The Help. All Johnny wants from Celia is for her to be happy. He doesn't care that she can't cook, properly take care of their house or that she had multiple miscarriages trying to give him children. Their first scene together where Johnny sneaks behind Celia and pulls her in close establishes their relationship pretty well.
Kevin's parents, Kate and Peter, mainly since Peter just lets Kate boss him around and make all their decisions.
Despite Uncle Frank being a grouch, he and Leslie seem to genuinely care for each other, even despite Frank's casual Jerkassery to everybody else.
The Hunger Games: The Everdeens had a loving marriage prior to Mr. Everdeen's death, never regretting their Uptown Girl situation.
George and Mary Bailey from It's a Wonderful Life. George is nothing but loving and devoted to his wife and Mary, unlike her husband, is perfectly content with married life in Bedford Falls.
Lake Placid: In 3, Nathan and Suan have an affectionate marriage with a decent amount of communication between them.
Alejandro and Elena in The Legend of Zorro for the most part. They do split up for awhile, but that was mostly because Elena was blackmailed into splitting up with him
Maggie & Annie: Annie and Bill are in a happy marriage together with a daughter when the film starts. Annie's falling in love with Maggie however makes things difficult.
Greg Kinnear and his wife in The Matador are happily married, and their relationship is never at stake.
All three main couples from the Meet the Parents series: Greg and Pam, Jack and Dina, and Bernie and Roz. Their conflicts are only with people outside their relationships.
Miss Meadows: Mike and Miss Meadows (or Mrs.?) are shown as a very happy couple in the epilogue with their baby daughter.
In Mother and Child, Karen and Paco, who both work as caregivers at the same hospital, don't start off well together - she's standoffish to him (though she's like this with everyone she meets, except for the patients she treats), and he doesn't react well - but eventually she thaws up towards him, and they end up being married and happy. Not only that, he encourages her when she decides to try and find her biological daughter.
In The Mummy Returns, which takes place nine years after the The Mummy, Rick and Evy are revealed to be married and have a son, Alex. Rick risks his life for his wife when he saves her from being killed by Imhotep and Anck-Su-Namun and she does the same when she runs toward him and saves him from being pulled into the Underworld as the temple crumbles.
In The Old Guard, the immortal fighters Joe and Nicky. They are not literally married — as their same-sex, inter-religious relationship would have been socially unacceptable for much of the time they've been alive — but they have been together for nine centuries and are still completely devoted, affectionate and even flirtatious with each other.
The Old Man & the Gun: Detective Hunt is happily married to a supportive wife, and their relationship never causes any complications in the plot. Interestingly, it's a mixed-race marriage, which would have been more unusual in the Midwest during 1980s, but it's never even acknowledged.
Adam and Eve in Only Lovers Left Alive have been married for centuries. They're still desperately in love with each other, and that love forms the emotional core of the entire movie. Interestingly, at the beginning of the film they're not living together, implying that they occasionally spend long periods of time separated. Adam likens them to entangled particles, where they are both affected in the same ways even if separated to opposite sides of the universe.
In Ring of Fear, trapeze stars Valarie and Armand St. Dennis are happily married: a fact that drives Dublin O'Malley, who is an old flame of Valerie, into a murderous rage.
Rocky and Adrian are consistently shown to have a very close and loving marriage that lasts through all the difficulties thrown at them. Despite being very different people, the sequels make it clear that their marriage is a deeply loving one.
Sappho: Sappho and Phil start out this way. Then things become difficult as Sappho grows enamored with a lovely woman on their vacation to Greene.
Tom and Maddie Wachowski from Sonic the Hedgehog (2020). Even though in the first movie, Maddie's sister Rachel seems to have a problem with Tom, Tom and Maddie still strongly supported each other and have now Happily Adopted Sonic which carries on in Sonic the Hedgehog 2 (2022).
Spider-Man 2: Dr. Otto Octavius and his wife Rosie Octavius are not shown to have any marital problems or arguments and are portrayed as having a happy marriage.
Cliegg Lars and Shmi Skywalker. He bought her and freed her from slavery due to his love for her. After Shmi's death, the way Cliegg talks about her makes it clear how special she was to him.
Poor doomed Uncle Owen and Aunt Beru fit this trope as well. Uneasy relations with Luke aside, they are content to live together on Tatooine as moisture farmers. Even before they're married, they're shown to be a happy couple in Attack of the Clones.
The Little parents in Stuart Little, to the point where they finished the other's sentences. The moment they couldn't tell what the other was thinking led to slight panic, but all got resolved.
In Suffragette the chemist and her husband have the only happy marriage shown in the entire movie. The husband is the only man shown who is supportive of women's voting rights, and the one time he's against one of her plans is when he's worried that she, due to her already damaged health, won't survive another run-in with the police.
The Thin Man: Nick and Nora Charles are always in lock step with each other throughout the film series. It's been said theirs was among the very first truly happy marriages depicted by American cinema.
Undercover Blues: Despite a few disagreements about, e.g., taking the baby into dangerous situations, Jane and Jefferson Blues are one of the finest examples of Happily Married to be spotted in an action film. Their easy camaraderie is an enjoyable counterpart to the danger they're facing.
Adelaide and Gabe from Usdon't have much in common, but clearly respect each other and have a peaceful domestic life together, raising their kids happily. This is one thing Adelaide's Tethered counterpart Red hates so much; due to their Psychic Link, she was forced to mimic Adelaide's actions. But while Adelaide got to fall in love with a handsome man, marry him, and have children they both wanted, Red was forced to "marry" Gabe's Tethered Abraham, whom she explicitly does not love, and bear children she explicitly didn't want.
Shelley and Helen Martin in Violent Saturday. Their marriage is used to contrast the rapidly disintegrating marriage of Shelley's workmate Boyd Fairchild and his wife.
Mike and Jackie Flaherty from Win Win. Their relationship can get harried, but it's ultimately a loving and commited one.
Andy Knightley from The World's End. Or so he claims. He's actually been having major difficulties as of late, although they get resolved by the apocalypse.
