Works with their own trivia pages:

* ''Trivia/{{Aliens}}''
* ''Trivia/{{Alien 3}}''
* ''Trivia/AlienResurrection''

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!!Trivia for the franchise in general:

* BasedOnADream: Not the film series' premise, but the creatures themselves. Their design is the work of Creator/HRGiger, who took them from his nightmares.
* DisownedAdaptation: Co-creator Ronald Shusett has criticized ''Film/{{Prometheus}}'' for being the complete antithesis of the first movie. As with many fans, he's also not fond of ''Film/{{Alien 3}}'' or ''Film/AlienResurrection''.
* FanNickname:
** Xenomorph - Used once or twice, among many other words, to describe the aliens in the franchise, this word stuck as the standard term used by fans. It became used to specifically refer to the films' creatures in merchandise, the Dark Horse comics, and video-game spinoffs, and was eventually canonized when Xenomorph-[=XX121=] became the official name for the creatures in the ''Out of the Shadows'' trilogy and the ''Alien: The Weyland-Yutani Report''.
** Other names for the species used in spinoff media are 'Internecivus Raptus' (Murderous Thief) and 'Linguafoeda Acheronsis' (Foul-tongue from Hell, Acheron being also the name of the planet on which the creatures were first encountered in ''Alien'').
** None of the life cycle stages (i.e. Facehugger, Chestburster, Drone) were ever officially named on-film. They were given Fan Nicknames which simply stuck and wound up being used in some of the expanded universe material and even eventually by the production staff themselves.
* FlipFlopOfGod: Whether the 3rd and 4th films are canon. In 2014, the ''Literature/AlienOutOfTheShadows'' trilogy of novels was officially recognized by Fox as canon to the ContinuityReboot of the franchise, but when the author of the second novel was going to disregard ''3'' and ''Resurrection'', they made him include references to them. In a 2016 interview Sigourney Weaver said that ''Alien 5'' is set in an AlternateUniverse that "[runs] parallel" to the 3rd and 4th films, where Newt and Hicks survived.
* FranchiseKiller: Not everyone was very happy about how ''3'' or ''Resurrection'' turned out, and [[IntercontinuityCrossover mashing it up]] with ''Franchise/{{Predator}}'' hasn't done much to restore faith in the series. The games tended to do better than the films.
* GodNeverSaidThat: After Neill Blomkamp and Sigourney Weaver made ambiguous comments about the fifth film being a followup to the second movie in early 2015, sites began reporting that that the fifth movie was going to finally decanonize the controversial ''3'' and ''Resurrection''—long regarded as FanonDiscontinuity by many fans. Blomkamp eventually had to come out and clarify that his statements had been taken out of context, and that the 3rd and 4th films were still canon. Concept art of an adult Newt [[FlipFlopOfGod makes the validity of that statement questionable]].
%%** And yet the released concept art for the film features [[spoiler: an older Ripley, an alive but scarred Hicks, and an adult Newt]] so who the hell knows at this point.
* TheGreatPoliticsMessUp: As everybody knows, Weyland-Yutani is a combination of motoring conglomerate British Leyland and generic Japanese. Ah, British Leyland, that pride of the nation, a household name for decades and trailblazer for the world, such an unstoppable industrial force would surely spread its MegaCorp tentacles across the galaxy for sci-fi centuries to come. Thing is, this film was released in 1979 and British Leyland went bankrupt in 197'''5'''. For Britons, the fall of a once proud company was the ultimate symbol of Britain's postwar decline—at least, if you're old enough to have heard of the company in the first place. For Americans, two words—General Motors. Oh, and Japan tanked in the '90s too. But the Asian half of the equation is fine. In 2009, the shattered remnants of British Leyland went bankrupt one last time—and were [[ChinaTakesOverTheWorld bought out by the Chinese]].
* ImageSource: This franchise provides the page image for (those for the other films are listed on their respective Trivia pages):
** BizarreAlienBiology
** RuleOfScary
* KeepCirculatingTheTapes: The "Aliens" Mod for ''VideoGame/{{Quake}}'' was killed by Fox lawyers (creating the term "Foxed" for that situation), but of course that didn't stop it from being available online for many years afterwards.
* TropeNamer: These movies named the following tropes:
** ChestBurster - This is the part of the aliens' reproduction method, and main gateway to horror.
** FaceFullOfAlienWingWong - TropeCodifier, but not the [[VGCats direct trope namer]].
** FaceHugger
** GameOverMan - Not an example itself; [[JustForPun just for the terrible pun]].
** ItsTheOnlyWayToBeSure - Suggested in ''Aliens'', but the main characters don't get to pull it off.
** StayFrosty - Originated by Corporal Hicks.
** VasquezAlwaysDies - After the tough female character by that name who dies in the second movie.
* WhatCouldHaveBeen:
** There were brief talks of James Cameron's interest in writing a script for a possible ''Alien 5'' with Creator/RidleyScott interested in directing, but Fox chose to focus on ''Film/AVPAlienVsPredator'' instead.
** ''Alien 3'' and ''Alien Resurrection'' nearly became CanonDiscontinuity during the writing of ''Alien: Sea of Sorrows'', before 20th Century Fox changed their mind and had the author revise the book to reference the events of the films. Rumors proclaimed that the fifth film ''was'' going to decanonize them, but Blomkamp himself debunked the rumors, saying his comments were being taken out of context.
** A near case with Neill Blomkamp's Alien sequel. Blomkamp had been making conceptual art in his free time as a possible but unlikely film pitch since Fox didn't even know about his ideas. When the art was released on the internet, Fox surprisingly took interest and hired him for the project.
** Of all the places, the Ride/DisneyThemeParks intended to make the franchise into a ride at Tomorrowland involving a Xenomorph being accidentally released into a confined spaceship with the guests. Due to some of the management not wanting to associate with an R-rated movie (a movie they've since gone back on), changes were made at the last minute to create ''[[Ride/AlienEncounter The [=ExtraTERRORestrial=] Alien Encounter]]'', such as using an original species that was a vague Xenomorph expy. Another idea that had also been considered was a LightGunGame ride where guests would take aim at Xenomorphs invading a spaceship, but this too never came to be. ''Alien'' was finally able to make it into the Disney parks in 1989, when it was included among the many scenes of ''Ride/TheGreatMovieRide'' at Disney's Hollywood Studios.
* TheWikiRule: There's the Alien Anthology Wiki, which can be found [[http://alienanthology.wikia.com/wiki/Alien_Anthology_Wiki here]]. There's also [[http://avp.wikia.com/wiki/Main_Page Xenopedia]].

!!Trivia for the first film:

* AbilityOverAppearance: The script was written so that any character could be played by either a woman or man. The filmmakers originally wanted a guy for Ripley, but Creator/SigourneyWeaver owns the role.
* AFIS100YearsSeries:
** AFIS100Years100Thrills: #6
** AFIS100Years100HeroesAndVillains:
*** #8 Hero, Ellen Ripley
*** #14 Villain, The Alien
** AFIS10Top10:
*** Science Fiction, #7
* BillingDisplacement: Tom Skeritt (Dallas) is billed above SigourneyWeaver in the credits, as Ridley Scott did not want to spoil the fact that Ripley was going to be the lone survivor of the ''Nostromo''. Of course, [[LateArrivalSpoiler the existence of the sequels make this impossible now]].
* DeletedScene: From near the end of the film, as Ripley comes across Dallas while setting up the ship's destruction, going through the process of being turned into another egg and finishing the explanation of the aliens' life cycle. Ridley Scott loved the idea, but found that the scene was too much of a speed bump in the middle of the climax.
* EnforcedMethodActing:
** The cast knew the general details of what they were shooting for the ChestBurster scene, but they didn't know they were going to get sprayed with real animal blood and entrails. Veronica Cartwright's shocked scream is entirely real.
** Cartwright ''really'' slapped Creator/SigourneyWeaver. That wasn't just a sound effect, and Weaver's recoil and look of shock is genuine. According to the actress in the DVD commentary, she was fed up with Sigourney, who at that point had acted only on the stage and so was not used to pretending to get hit, instinctively flinching away from the slap and so, after numerous failed takes, faked the first slap and then properly hit her when she flinched.
** Creator/RidleyScott placed a veiled cage with a German Shepherd in front of Jones the Cat, and unveiled it when he shouted "Action!!" Hence when The Alien rose up behind Brett like a phallic gargoyle, the menacing hissing of fear from the poor kitty cat was ''real.''
** In a lesser known example, Creator/RidleyScott made sure that Bolaji Badejo ([[PeopleInRubberSuits the man who played the Alien in most of the scenes]]) did not take tea or lunch breaks with the rest of the cast so their fear of the alien would be more genuine.
** Yaphet Kotto did a lot of improv acting. Scott played along with it, and advised him to antagonize Sigourney Weaver, so their conflict later in the film would be more believable. When Ripley yells at Parker to "SHUT UP!" after Dallas's death, Weaver already had to listen to Kotto talking over her dialogue dozens of times.
* ExecutiveMeddling:
** According to the audio commentary, Ash as a character did not exist in the original concept at all, and was added during production. This apparently annoyed one of the writers, thinking it an unnecessary and a distracting diversion from the main plot, though the other writer and Scott thought it a [[TropesAreNotBad good twist]].
** Heck, this film is one of the few good examples of this trope paying off. The above detail of Ash was introduced by two of the producers associated with Fox, David Giler and Creator/WalterHill, who also extensively rewrote the script to give a more natural flow to characters' lines and interactions. Definitely appears to have paid off.
** Another big one was Scott wanting the final scene where Ripley was giving the last report of the ship and her crew to be the alien using Ripley's voice. The suits really had to fight him on that one.
* FanNickname: Space Jockey—the alien pilot aboard the derelict ship—extended to the rest of his race, as well. Derived from a name used by the film crew; in the canon, it's never named. In ''Film/{{Prometheus}}'' they're called the "Engineers".
** The adult creature is sometimes dubbed "Kane's Son", after a line used by Ash.
* GenderFlip: Ripley was written so that the character could be played by either a woman or a man.
* OneBookAuthor: An acting variant. Bolaji Badejo, the guy in the Alien suit, apparently vanished into thin air after completing the 1979 film. Although considering he was found in a pub and only hired because he was massive and very thin, this is understandable. A 2016 CNN article revealed that after filming, he [[http://www.cnn.com/2016/03/07/africa/bolaji-badejo-alien/ just simply returned to normal life]] in his hometown of Lagos and ran an art gallery there before passing away from complications of sickle cell anemia in 1992.
* TheOtherMarty: Actor Jon Finch had been cast in the role of Kane, but had fallen very ill due to his diabetes and was replaced by Creator/JohnHurt.
* TakeThat: One common story is that "Weyland" and "Yutani" were the names of two of Creator/RidleyScott's neighbors whom he didn't like. However, this isn't the case. Ron Cobb, the designers of the movie came up with the name "Weyland-Yutani":
--> ''...Weyland Yutani for instance is almost a joke, but not quite. I wanted to imply that poor old England is back on its feet and has united with the Japanese, who have taken over the building of spaceships the same way they have now with cars and supertankers. In coming up with a strange company name I thought of British Leyland and Toyota, but we couldn't use "Leyland-Toyota" in the film. Changing one letter gave me "Weyland," and "Yutani" was a Japanese neighbor of mine.''
* ThrowItIn: According to Website/{{IMDb}}, most of the dialogue was ad-libbed.
* TroubledProduction: It had a smoother production than most of its sequels, but not an entirely trouble-free one. Most of the problems that did occur were in pre-production, firstly when the producers were having trouble finding a studio to back the film, and then when looking for a director. They were initially keen to hire Robert Aldrich, but when they actually met him, they were dismayed to find that he didn't give a shit at all about their vision and was just looking for a quick paycheck. Several more directors passed on the project, and producer Walter Hill considered directing it himself before a sample of Creator/RidleyScott's work just happened to pass his desk.
** Production itself was relatively smooth, the main problems being friction between the producers and screenwriter Dan O'Bannon (who didn't like that Hill had rewritten the screenplay to have more gritty and realistic dialogue), and the visual effects team being sorely under-funded and under-equipped, which resulted in cinematographer Derek Vanlint having to gather up all his lighting equipment and lend it to the VFX team at the end of each day. Additionally, Music/JerryGoldsmith composed a substantial amount of music for the film, only for Scott to throw most of it out and have the finished product largely unscored while replacing some of the music with a Howard Hanson composition and tracking in Goldsmith's music from ''Film/{{Freud}}'', enraging Goldsmith and resulting in the two not working together again until ''Film/{{Legend}}'' (where the music was also screwed with).
* UpToEleven:
** Rumor has it that the scene where Kane dies from a ChestBurster emerging out of him was so violent that several audience members fainted or started vomiting.
** The scene where [[spoiler: Ash is decapitated]] caused an usher in London, England to faint.
* WorkingTitle: The first film was known as "Star Beast" in its earliest stages. When the writer went through the script he saw characters constantly referring to the Alien, and then the title came out at him, noting that is both a noun and an adjective.
* WhatCouldHaveBeen:
** Creator/HarrisonFord turned down the role of Captain Dallas in ''Alien''.
** When it came to casting Ripley, Creator/RidleyScott had to choose between Creator/SigourneyWeaver or Creator/MerylStreep.
** Creator/RidleyScott and some of the cast mention in the audio commentary that he had the idea that casual sex happened between any and all members of the group [[EveryoneIsBi regardless of sex]], and that, in hindsight, he would have liked to show a homosexual relationship. A scene related to this would have been a conversation between Ripley and Lambert, one clarifying that they had either had sex or been solicited for sex by every man on the ship except Ash, as a way of foreshadowing that he is, in fact, an android.
** Related to the above example, there were talks of a lesbian relationship between Ripley and Lambert.
** The original script had a DownerEnding where the alien kills Ripley, then imitates her voice in a call to Earth, indicating it's headed there next. Scott was persuaded that the film was horrific enough without it.

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