History AdaptationExpansion / LiveActionFilms

*** Mr. Brown becomes an OverprotectiveDad (played for laughs) and risk analyst.

* At the time of writing the movie, the ''Franchise/SuperMarioBros'' series didn't have much story or defined personalities for the characters unless you counted the various cartoon series or somewhat obscure comics. Because of this, the writers of the ''Film/SuperMarioBros'' movie had to write the story from the angle of a prequel, exploring ''how'' the Mario Bros. became the '''Super''' Mario Bros. In the process Mario and Luigi were given an older brother/younger brother dynamic/conflict and Koopa was provided a motivation for needing the Princess.

** Blue Sky's computer-animated ''WesternAnimation/HortonHearsAWho'', on the other hand, actually doesn't stray too far from the limited source material, although there are still tons of added elements, notably an anime-styled scene in the middle and a sudden CrowdSong at the end.

*** ''Comicbook/OldManLogan'': Much of the comic would have been impossible to adapt due to the distribution of film rights. Among the only things taken from the original book is following an aging Logan, who also has an aging companion from the past (Hawkeye in the book, Charles in the film).
*** ''Comicbook/InnocenceLost'': Substantial material is adapted from Comicbook/{{X 23}}'s origin story, with Transigen serving as an {{Expy}} for the Facility, while also introducing Zander Rice, and of course X-23 herself. Elements of her creation and training appear in an in-universe film Logan finds. This material is itself further expanded upon, with X-23 being not just Laura, but an entire ''group'' of mutant children with different powers from different donors. [[spoiler:Logan's death also nods towards the death of Sarah Kinney in the book, as he ultimately gives his life trying to help her escape her pursuers, and gets to share a final, poignant moment with his daughter, dying in her arms]].
*** [[spoiler:''Comicbook/DeathOfWolverine'': Logan dies. His thick beard and tuxedo early on is very similar to an outfit he wears in part of the comic miniseries, and like the series a major setting of the film is at the casino. Logan sacrificing his life to save mutants from experimentation also serves as a nod to the books.]]

** ''WesternAnimation/TheLorax'' adds additional characters and expands beyond the book's original ending as the boy ([[NamedByTheAdaptation now named Ted]]) attempts to carry out the Once-ler's wishes. But in a disturbing twist, the Once-ler is portrayed as human...and here comes the [[{{Anvilicious}} aesop anvil]] on schedule.

AdaptationExpansion in movies.

%%** ''Film/{{Imposter}}''

*** In the book, the Ministry simply passes various decrees. In the film, each decree is nailed to the wall outside the Great Hall as Umbridge gradually seizes control of the school. This is also a set up for her eventual HumiliationConga - where Fred and George cause them all to fall and come crashing down around her.

* Many ''Series/SaturdayNightLive'' characters have transitioned from SketchComedy to feature films: ''Film/TheBluesBrothers'', ''Film/WaynesWorld'', ''Film/ItsPat'', ''Film/StuartSavesHisFamily'', ''Film/{{Coneheads}}'', ''Film/ANightAtTheRoxbury'', ''Film/{{Superstar}}'', ''Film/LadiesMan'', and ''Film/MacGruber''. Some became classics, others...didn't.

* ''Film/BeautyAndTheBeast2017'' also expands on the story from [[WesternAnimation/BeautyAndTheBeast the animated version]], fleshing out the characters in various fresh ways, explaining Belle's family backstory and how her mother died, giving the Beast a backstory of his own with a {{Freudian Excuse}}, adding further scenes in the village to highlight Belle's unconventionality and misfit status, as well as further scenes of her bonding with the Beast at the castle, filling in the {{Plot Hole}} of why the villagers don't know that the Beast is their kingdom's enchanted prince, and bringing Gaston's villainy {{Up To Eleven}} with an attempt to murder Maurice.

* The Warren Ellis comic ''ComicBook/Red2004'' was originally a three-issue thriller about a retired CIA agent being lined up for assassination by a new administration that was horrified about what would happen if his track record was made public. The [[Film/Red2010 movie adaptation]] made it a comedy and threw in a bunch of fellow retired agents - all with the blessing of Ellis, who admitted the actual miniseries "would maybe run forty minutes, if there were a musical number."

* The Warren Ellis comic ''Comicbook/{{Red}}'' was originally a three-issue thriller about a retired CIA agent being lined up for assassination by a new administration that was horrified about what would happen if his track record was made public. The [[Film/{{Red}} movie adaptation]] made it a comedy and threw in a bunch of fellow retired agents - all with the blessing of Ellis, who admitted the actual miniseries "would maybe run forty minutes, if there were a musical number."

** In the Alistair Sim and George Scott versions, Fan was Scrooge's ''older'' sister, and the backstory tells that Scrooge's mother died giving birth to him, and this is why his father sent him off to boarding school. The former also has a scene of Fan's own DeathByChildbirth.

* ''Film/TheTenCommandments'' undeniably has more to do with Moses's love life than the ten commandments -- not for a lack of source material (about the commandments, not Moses' love life).

* ''Film/ShredderOrpheus'' is an adaptation of [[Myth/ClassicalMythology Orpheus and Eurydice]] that goes into detail over what happens after Orpheus turns around, and even gives him another chance to save Eurydice a year after his initial quest.

* ''Film/TheScarletLetter'' film adaptation adds gore, Indian raids, and a whole first act to detail the sexual affair dealt with in the rest of the film.

** ''Film/TowerOfTerror'': a MadeForTVMovie a test to see if film adaptations of rides would be a hit amongst audiences. The story of the haunted hotel from the ride introduction is made theatrical, though it was divorced from its ''Series/TheTwilightZone'' roots.

** The upcoming 2020 film ''Film/JungleCruise'', loosely based on the ride of the same name and expanding upon the ride's backstory.

* Many ''Series/SaturdayNightLive'' characters have transitioned from SketchComedy to feature films: ''Film/TheBluesBrothers'', ''Film/WaynesWorld'', ''It's Pat'', ''Stuart Saves His Family'', ''Film/{{Coneheads}}'', ''Film/ANightAtTheRoxbury'', ''Film/{{Superstar}}'', ''Film/LadiesMan'', and ''Film/MacGruber''. Some became classics, others...didn't.

* Creator/StevenSpielberg's ''Film/TheBFG'' lengthens the Creator/RoaldDahl by adding several subplots, such as [[spoiler:reveals about a boy the BFG had taken in before, Sophie getting returned to the orphanage and calling the BFG to come back]], and greater emphasis on the other giants bullying the BFG.

* ''Film/PerfectPie'': In the movie Francesca comes to sing for a charity event Patsy is holding, and stays for the weekend instead of just the day. This gives the movie time to put in multiple subplots that weren't in the [[Theatre/PerfectPie play]], including Marie and Patsy having been in church chorus, them having planned on competing in a musical competition, and Francesca meeting and reconciling with the date who abandoned her at the dance.

* The original play ''Film/GlengarryGlenRoss'' did not feature Blake or [[OneSceneWonder his scene]] at all. Most agree the story works a lot better with the added setup.

** [[spoiler:The whole plot about the memory serum is actually moved to much earlier in the timeline. Because Nita's rebellion is adapted out, Four immediately goes to Chicago following the aforementioned village's rescue, and Tris gets to visit Chicago again (in the novel, she spends her entire time in the Bureau). The battle between the Allegiant and the factionless is thus expanded, not to mention furthering Evelyn's role (she's essentially relegated to the background until Four's visit in the novel, which happens much, much later). David also has a very direct role in the battle. How ''The Divergent Series: Ascendant'' is going to fill the rest of the book's events is yet to be seen, seeing that the only event left uncovered is Tris' death]].

* ''Film/AIArtificialIntelligence'': The only things in common with Brian Aldiss' short story "Super-Toys Last All Summer Long" are the Swinton parents, Teddy, and David... who looks three, not twelve, and the Swintons have as a test run for when they have a real son, rather than as a replacement for an already born son. Everything that happens afterward in the movie is more inspired by ''{{Literature/Pinocchio}}''.

* Spielberg's previous work ([[AuthorExistenceFailure inherited after Stanley Kubrick's death]]) was also a short story adaptation, ''Film/AIArtificialIntelligence'', from Brian Aldiss' "Super-Toys Last All Summer Long".

** ''Film/HarryPotterAndTheGobletOfFire'': The film includes a new scene taking place after the Goblet ceremony where Dumbledore, [=McGonagall=] and Snape discuss the recent events in Dumbledore's office. [=McGonagall=] is worried about Harry's safety and wants to do something about it, while Snape thinks that since they have no idea of what's going on, they should stand by until it becomes more clear. Dumbledore agrees with Snape and starts using his Pensieve to investigate.