Mary Costa, the voice of Aurora in Sleeping Beauty (1959), is the only living original voice actress not to reprise her Disney Princess, as she was 88 years old and had retired from acting.
The mid-credits sequence shows a memorable scene from the first Ralph Breaks the Internet trailer that ended up being cut from the final film. As a meta joke, the little girl in the mid-credits scene prefaces the gag by telling her mother that while she enjoyed the movie, she's annoyed that there was a scene from the trailer that didn't show up.
Merida and Buzz Lightyear are the first major characters from a Pixar Film to make their first full appearance in a film not by Pixar.
To get Vanellope's song really Disney-ish, Alan Menken was asked to compose it. Alan Menken, along with his songwriting partner Howard Ashman, is responsible for all the catchy tunes in The Little Mermaid (1989), Beauty and the Beast (1991), Aladdin (1992), Pocahontas (1995) and others.
Michael Giacchino: As dime-a-dozen as those Stormtroopers are, the one leading the chase against Vanellope is actually an established drone. The credits identify him as FN-3181, a trooper from Star Wars: Episode VII - The Force Awakens (2015), with Giacchino reprising the role.