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''My Favorite Martian'' is a 1999 science fiction comedy film starring ChristopherLloyd as an alien who crash-lands on Earth and Jeff Daniels as Tim O'Hara, the human who takes him in. It is based on the [[Series/MyFavoriteMartian 1960s sitcom of the same name]].

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!!This film provides examples of:

* AdaptationExpansion: The movie introduced new characters (Lizzie, Brace, and Zoot) as well as several new pieces of Martian technology. The most notable would be "nerplex," or Martian gum that changes the appearance of whoever is chewing it (which is how Martin can appear as a human).
* BalefulPolymorph: [[spoiler:Coleye]] ends up being permanently transformed into an alien near the end of the film, when he accidentally swallows a piece of Nerplex.
* BigEater: Tim takes Martin to an ice cream shop. Although initially wary of Earth food, Martin proceeds to consume ''all'' of the ice cream.
* BrainlessBeauty: Brace is sufficently dim she has to be drip fed her on-air lines through an earpiece.
* ChekhovsGun: The Veenox 7 gum, which [[spoiler:turns whoever chews it into a large, powerful, man-eating monster.]]
* ComicallyMissingThePoint: When Tim complains how Martin was asleep for about 30 seconds, Martin marvels about it, claiming he must've been tired to sleep for that long.
* CulturalPosturing: Martin provides several examples of Martians being more advanced than humans ("Your astronauts pee in their space suits. Case closed!"). Later subverted when it turns out that the alternator from Tim's car will double as an "electron accelerator" to fix his spaceship.
* DancingPants: Martin has a full dancing ''suit'' named Zoot.
* DisneyDeath: Martin gets one at the end when he is dissected by the BigBad, and Zoot gets one after getting shot twice by one of the security guards.
* DoubleStandardAbuseFemaleOnMale: Lizzie reacts rather violently towards Tim when she finds Brace in his house.
* DumbBlonde: Inverted; the dumb one in this case is brunette Brace Channing, and blonde Lizzie is the smart one.
* FanDisservice: The DirtyOldMan in the video making his pecs dance to "Hot Hot Hot".
* FeigningIntelligence: Brace Channing.
-->'''Martin (after turning himself into Brace):''' "Boy, her head was dark and empty."
* [[FourTemperamentEnsemble Five-Temperament Ensemble]]: Brace Channing (choleric), Lizzie (melancholic), Felix (phlegmatic), Martian Martin and Zoot the suit (sanguine), and Tim O'Hara and Neenurt (leukine).
* GreenAesop: Martin's parting words to Tim include reminding him to take care of the Earth's oceans. Although this may be justified by the fact that Martin was completely blown away that Earth even has them, given that "on Mars, all the water has to be squeezed from rocks!"
* HardHead: The guard Tim hits over the head with a fire extinguisher seems to be entirely unaffected.
* JerkAss: Brace and her father (Tim's boss).
* LargeHam: Martin and Zoot.
* LosingYourHead: Martin literally falls apart when he goes into "Martian depression."
* MissedHimByThatMuch: The opening of the movie shows the failure of the Mars rover just before it would have shown footage of the Martian society.
* MonsterRoommate
* MySensorsIndicateYouWantToTapThat: Martin is forced to take on Tim's form early in the movie and kisses his friend Lizzie. Martin later helps Tim realize that he and Lizzie are more than JustFriends.
* MythologyGag: [[spoiler:Ray Walston (the original Uncle Martin) is an undercover martian. And he even says the shapeshifting gum lost its flavor in 1966 (the year the show got cancelled).]]
* NightmareFetishist: Tim claims he ''likes'' [[spoiler:Lizzie's transformed man-eating alien form]].
* [[OhCrap Oh Blotz]]:
** When Martin discovers the I.S.S. on the spaceship.
** When Martin is disguised as Brace and is forced to spit out the gum that makes him resemble a human.
* PardonMyKlingon: Apparently, "blotz" is a direct Martian translation for "shit"... as in "Does a wild bear blotz in the woods?"
* PecFlex: Hilariously done by a senior citizen.
* PlugNPlayTechnology: Tim's alternator is ''exactly'' the right size and shape (and function) to double as the piece Martin needs to repair his ship.
* ScienceMarchesOn: The movie {{Hand Wave}}s the fact that there is no life on Mars by placing the vast, technologically advanced Martian cities just out of sensor range.
* SkywardScream: Dr. Coleye does this during his EvilLaugh
* SpoiledBrat: Brace Channing.
* StealthPun: The Martian researcher's full name is Elliot Coleye (E. Coleye).
* SuspiciouslySpecificDenial: "Not only that was top secret, but it never happened!"
* ThatPoorCat: Heard towards the end when Martin lands his spaceship at Tim's driveway.
* TheGenieKnowsJackNicholson: Zoot remarks, while hiding under Tim's couch, "Hey, look! Jimmy Hoffa!"
* TheMindIsAPlaythingOfTheBody:
** Not directly stated, but there are implications that Nerplex does simply more than alters one's physical appearance into another being. The most notable incident is when [[spoiler:Lizzie chews the Veenox 7 gum, and seems to have no problem with killing one guard, and eating another while as that alien]]. This even seemed to carry over when the person reverts back to being human. Though this may only be trait [[spoiler:specific to Veenox 7, which would explain why Martin was so heedful when mentioning it]].
** Marvin's quote after assuming Brace's form seems to indicate he had some sort of [[Franchise/StarTrek mind meld]] like connection with the real Brace's brain (or [[BrainlessBeauty lack of brain]] in her case.)
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