* ActingForTwo: Or rather, acting for four, in the case of Peggy Lee, who does the voices of Darling, Si, Am and Peg.
** And in the case of Bill Thompson, acting for ''five'', doing the voices of Jock, Joe, two of the dogs at the dog pound (the bulldog and the dachshund), and the policeman at the zoo.
* BasedOnATrueStory: The first scene, anyway. WaltDisney once gave his wife Lillian a puppy as a Christmas present, and he put it in a hatbox to heighten the surprise.
* TheDanza: Peggy Lee not only voices Darling and the two Siamese cats, she also voices Peg, one of the dogs at the pound.
* FakeNationality: Despite the wide range of international characters throughout the film, there are quite a few instances of this:
** Peggy Lee (Swedish Lutheran) [[{{Yellowface}} as the two Siamese cats]].
** Alan Reed (American Jew) as [[FakeRussian Boris the Russian Wolfhound]].
** Bill Thompson (native of Terre Haute, Indiana) as Jock the [[UsefulNotes/{{Scotland}} Scottish terrier]], Dachshie the German dachshund, [[FakeBrit Bull the English bulldog]], Joe one of the two {{Italia}}n chefs, and the [[{{Oireland}} Irish]] [[OfficerOHara Police Officer]].
* HeyItsThatSound: The zoo hyena's laugh was later heard in ''Film/{{Elf}}'' from a jack-in-the-box, and in a ''Franchise/CrashBandicoot'' video game.
* HeyItsThatVoice: StanFreberg voices the Beaver.
** Peggy Lee voices Darling, Si and Am and [[TheDanza Peg]].
** Bill Thompson voices ''various'' characters in the film, including: Jock the Scottish terrier, Bull the English bulldog, Dachshie the German Dachshund, the policeman outside the zoo and plenty more. This [[Disney/PeterPan was]] [[Disney/AliceInWonderland not]] [[Disney/SleepingBeauty the]] ''[[Disney/TheAristocats only]]'' Disney animated feature he appeared in, either.
** [[TheFlintstones Fred Flintstone]] as Boris the Russian Wolfhound philosopher at the dog pound.
** MandyMoore voices Lady in some later installments of the franchise.
** Crreator/StanFreberg voices the beaver.
** The DirectToVideoSequel has:
*** [[WesternAnimation/KaijudoRiseOfTheDuelMasters Ray Okamoto]] is Scamp
*** [[WesternAnimation/YoungJustice Poison Ivy]] is Angel
*** [[{{WesternAnimation/Animaniacs}} Wakko Warner,]] [[WesternAnimation/RoadRovers Hunter]] and [[WesternAnimation/DrawnTogether Captain Leslie Hero]] are Buster
*** [[{{SpongebobSquarepants}} Patrick Star]] is Mooch
*** [[Disney/TheFoxAndTheHound Adult Tod]] and OswaldTheLuckyRabbit are Sparky
*** [[WesternAnimation/HeyArnold Tish Wittenberg]] is Ruby
*** Tramp, Jock, Trusty and The Dogcatcher are done by Creator/JeffBennett
*** [[Disney/TheLittleMermaid Ariel]] is Lady
*** Annette is [[WesternAnimation/TheAdventuresOfJimmyNeutronBoyGenius Jimmy Neutron]]
*** Collette and Danielle are [[{{Rugrats}} Phil]] and [[{{AllGrownUp}} Lil]]
*** Tony is ''WesternAnimation/DarkwingDuck''
* ScrewedByTheLawyers: Peggy Lee sued Disney when the movie debuted on home video in 1988, citing that her contract did not allow them to use her voice on video. She eventually collected a seven figure sum, and Disney began including in their contracts rights to "media not yet existing."
* TalkingToHimself: Peggy Lee, Dallas [=McKennon=], Lee Millar and Bill Thompson each perform more than one role in the film.
* TropeNamer:
** SpaghettiKiss
* UrExample: This was the first animated feature screened in Cinemascope, the first Disney animated feature to be distributed under Buena Vista Distribution (as opposed to RKO Radio Pictures, as previous ones had) and also one of the first animated Disney films to be (mostly) based on an original story by Joe Grant.
** The casting of Peggy Lee as voice actor and songwriter was also one of the earliest examples of a "big name" in an animated feature at the time.
* WhatCouldHaveBeen: [[spoiler: Trusty]] was supposed to die after [[spoiler: the dogcatcher's wagon hit him]], but WaltDisney didn't want another serious death, following the trauma Disney/{{Bambi}}'s mom's demise caused many children.
** Boris the Russian Wolfhound (who appears at the pound) was originally supposed to be the male lead of the film, having Tramp's role. However, the title "Lady and Boris"..."just didn't have the right ring to it".
** Tramp/Boris was also supposed to have had a song, called "''I'm Free''", which he sang about his life as a happy stray. It was cut when the film was {{retool}}ed.
** In one early version, the rat spoke and was more of a troublemaker than a genuine menace. He would have had a Jersey gangster sort of personality.