Illustrations from Bernard Waber's "The House on East 88th Street" (1962) and "Lyle, Lyle Crocodile" (1965) are visible in the movie framed on the stairway wall, drawn by Mrs. Primm, and in the credits.
Released on the year of the 60th anniversary of "The House on East 88th Street", the first book in the series.
The movie contains elements of both of Bernard Waber's first two Lyle books: The House on East 88th Street (1962) and Lyle, Lyle, Crocodile (1965).
Despite being thought as unable to speak, Lyle is heard shouting, "Come on!" and "Oh! Oh!" when singing along to Stevie Wonder's "Sir Duke".
Before the production, Peter Gabriel, Bryan Adams, and Paul Williams auditioned to voice Lyle when Shawn Mendes was chosen.