Despite the original version of the film is Italian, the animation of the mouths of the characters was made on the basis for an English dub.
Based on the novel "Story of a seagull and the cat that taught her to fly" by chilean writer Luis Sepúlveda
In the Italian version, the voice of the poet is provided by Luis Sepúlveda, author of the book on which the movie is based.
Luca Biagini and Valerio Ruggeri, who provide the voices for Diderot and Segretario, worked together for years as the official Italian voices for Tigger and Rabbit in the "Winnie the Pooh" movies.