For the [[Series/Willow2022 2022 series]]' trivia, see [[Trivia/Willow2022 here]].
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* BillingDisplacement: Despite playing the main protagonist and title role, Creator/WarwickDavis is only given third billing behind Creator/ValKilmer and Joanne Whalley in the end credits.
* CelebrityVoiceActor: The Japanese dub features drama actor Yosuke Naka as General Kael.
* CrossRegionalVoiceActing: Voice actors from Mexico and Los Angeles were used for the Latin American Spanish dub.
* DeletedScene:
** There is a continuity error that involves the Magic Acorns Willow was given by the High Aldwin. During an interview with The Empire Podcast, Creator/WarwickDavis explained that in a scene near the end of the film, he throws a second acorn and is inexplicably out after having only used two of the three Magic Acorns he had been given earlier in the film. Included in the Blu-ray release is the cut scene, in which Willow uses an acorn (his second) in a boat to petrify a shapeshifting aquatic creature that attacked them during a storm. Davis says that his hair is wet in the next scene that did make it into the original version of the film, but the acorn is never referenced.
** A scene was filmed but cut, where during the battle at Tir Asleen, Sorsha finds her father, who has been turned to stone by Bavmorda. Sorsha's father communicates with her through the stone encasement and pleads with her to side with Willow and Madmartigan, help them protect Elora Danan and defeat Bavmorda. This far better explains Sorsha betraying Bavmorda and succumbing to Madmartigan's affections for her (the scene is present in the Marvel Comics adaptation).
* DisabledCharacterDisabledActor: All of the [[LittlePeople Nelwyn]] are portrayed by people who have real-life dwarfism.
* DuelingDubs: The film was dubbed twice into Japanese. In addition to the home media dub, another dub was made for the Creator/TokyoBroadcastingSystem in 1996.
* DVDCommentary: Creator/WarwickDavis provides one of the best commentaries ever heard. Everything you want to know about Willow is right here. He tells stories, talks about taking care of a baby, points out scenes that were deleted, gives behind-the-scenes info, talks about working with Creator/RonHoward and Creator/GeorgeLucas, and explains the joys of working with Creator/ValKilmer.
* DyeingForYourArt: Creator/JoanneWhalley dyed her brown hair fiery red to play Sorsha.
* {{Hobbits}}: Defied. WordOfGod states that the Nelwyn are the size of real world standard humans and the Daikini are giants.
* NeverWorkWithChildrenOrAnimals:
** The large group of pigs outside the castle continuously tried mating. Buckets of cold water were used to separate them.
** Because of slow production during filming, the babies outgrew the props and the baby carrier that Willow had on his back, so they needed a new baby quickly. The second assistant director, Gerry Toomey, recommended his new born niece, Rebecca Bearman, although she was never credited. The scene where the baby is sick on Burglekutt was not written into the script. Warwick Davis walked with a limp which gave Rebecca motion sickness. When she was lifted up, she threw up over his head, and it was so funny [[ThrowItIn they kept it in the film]].
* PopCultureUrbanLegends: There's a persistent rumor that Creator/PeterDinklage played a background Nelwyn in this film, but he didn't. He made his film debut in 1995, seven years after ''Willow'' was released.
* RealLifeRelative:
** Creator/RonHoward's wife Cheryl Alley and Creator/WarwickDavis' sister Kim Davis both appear as extras atop the snowy mountaintop village.
** In the Latin American Spanish dub, Javier Pontón voices Madmartigan and his sister Patricia voices Kaiya Ufgood.
* ReferencedBy: ''Series/ReservationDogs'' has a main character named Elora Danan. Pointing out her UnusualPopCultureName often prompts other characters to share unsolicited behind-the-scenes trivia or opinions about the film.
* RomanceOnTheSet:
** Creator/ValKilmer and Creator/JoanneWhalley got married in real life after meeting on the movie. Their marriage lasted eight years and produced two children.
** One of the many reasons why Creator/WarwickDavis is proud of ''Willow'' is that he met his future wife Samantha Burroughs who appeared as an extra. The two married in 1991.
* TechnologyMarchesOn: The morphing CG used with Fin Raziel was dated by the time ''Film/StarTrekVITheUndiscoveredCountry'' was released.
* ThrowItIn:
** Creator/ValKilmer ad-libbed most of his dialogue.
** Creator/WarwickDavis smirked when Mark Northover in character as Burglekutt sarcastically laughs at him in the scene which Burglekutt decides to abandon Willow at the crossroads with the group and go home. It was kept in the film.
* UnderageCasting: Creator/WarwickDavis was 17-18, playing a father of two.
* VindicatedByCable: Though its theatrical release disappointed the studio in 1988, it steadily developed a cult following thanks to video rentals and TV showings.
* WhatCouldHaveBeen:
** A number of scenes were deleted that contained the intended back stories of Madmartigan and Sorsha - the former a warrior prince of a noble family who disgraced himself (one early draft had him proclaiming that he "could have been king!"), the latter revealed to have had a good and noble king for a father (in fact he is the old king seen at the end of the film) and having been effectively brainwashed into being a villain by her evil mother. While there are some faint traces or at least a vague sense of Madmartigan's past in the film (it is not unreasonable to assume that he used to be a soldier of some sort) there is little to no sense of what makes Sorsha tick. This lost material was used in the novelization.
** Another deleted scene that was included in the novelization (and also the Marvel Comics adaptation) shows Willow successfully using one of the magic acorns to petrify a shape-shifting lake creature set by Bavmorda to guard the island where Fin Raziel was banished.
** Creator/JohnCusack reportedly auditioned for the role of Madmartigan.
** Creator/GeorgeLucas reportedly wanted ''Willow'' to be a trilogy of films like ''Franchise/StarWars'' and ''Franchise/IndianaJones'' but weak box office forced him to scrap the idea.
** The idea of CanonWelding by putting the film into the ''Franchise/StarWarsExpandedUniverse'' was tossed around for years, but all that came from it was a 2006 AprilFoolsDay prank. Another project, "[[http://starwars.wikia.com/wiki/Alien_Exodus Alien Exodus]]" would've linked this film, ''Star Wars'', ''Film/THX1138'', and even ''Film/AmericanGraffiti'' together.
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