Author Appeal: The movie is set during The Gay Nineties because Walt Disney was a big fan of that particular time period, and the town in the movie was inspired by his own hometown of Marceline, Missouri.
Based on a True Story: The first scene, anyway. Walt Disney once gave his wife Lillian a puppy as a Christmas present, and he put it in a hatbox to heighten the surprise.
The Danza: Peggy Lee not only voices Darling and the two Siamese cats, she also voices Peg, one of the dogs at the pound.
Fake Nationality: Despite the wide range of international characters throughout the film, there are quite a few instances of this:
Keep Circulating the Tapes: The version that Disney animated in the 1.37:1 Academy ratio, for theaters unable to show widescreen movies, has only received one official Walt Disney Home Video release. In 1998, Disney released it on VHS and LaserDisc, as part of the Walt Disney Masterpiece Collection. Reissues of the movie on newer formats only feature the CinemaScope version, leaving the Academy version unable to view, aside from some clips included in some of the bonus features.
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.
Trusty was supposed to die after the dogcatcher's wagon hit him, but Walt Disney didn't want another serious death, following the trauma 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 as the Breeze", which he sang about his life as a happy stray. It was cut when the film was retooled.
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. His name would also have been Herman.
A dream sequence was animated where the dogs took their owners for walks, but cut due to negative audience reactions.
The Classics tape that got Disney sued by Peggy Lee was the final sales tape to contain the early "Cheesy Diamond" The Classics: Walt Disney Home Video logo with the spinning logos, as well as the last new tape to have the line's logo on the back of the tape's case. It's also one of only two "Cheesy Diamond" tapes to not have a later Sorcerer Mickey Walt Disney Classics reprint note At least in the United States; a French VHS has the 1989 Sorcerer Mickey Walt Disney Classics logo on it ; the other was Sleeping Beauty, which followed Lady and the Tramp back into the vault.
The Masterpiece Collection tape a decade later was one of two titles in that line to have a widescreen version made, and again, Sleeping Beauty was the sister title to that.