Factual error: At the end of the movie, Lady has four puppies, three Spaniels, like her, and one mixed breed, like Tramp. Realistically, they would all be mixed breed with characteristics from both parents.
Lady and the Tramp (1955)
1 factual error - chronological order
Directed by: Wilfred Jackson, Clyde Geronimi, Hamilton Luske
Starring: Bill Thompson, Verna Felton, Barbara Luddy, Bill Baucom, Larry Roberts, Peggy Lee
Continuity mistake: When Jock and Trusty are telling Lady that Darling is having a baby, Lady's collar changes from blue to brown and back to blue when Tramp comes close to her.
Tony: Hey, Joe! Look! Butch-a, he's got a new girlfriend.
Joe: Well, a-son of a gun! He's a got a cockerel Spanish-a girl.
Tony: Hey, she's pretty sweet kiddo, Butch. You take-a Tony's advice and settle down with this-a one, eh? Hehehe.
Lady: "This-a one"?
Tramp: This-a one... this-a... Oh! Tony, you know. He's-a not-a speak-a English-a pretty good.
Trivia: Although the spaghetti-eating sequence is now the best known scene, Walt Disney originally did not want it in the film as he thought it would not be romantic and that two dogs eating spaghetti would look ridiculous. Animator Frank Thomas was against Walt's decision and animated the entire scene himself without any lay-outs. Walt was so impressed with Thomas's work he decided to keep the scene in.