- Creator Backlash: Beagle has been frank that he found the book to be the most difficult to write of any in his career. It's not that he dislikes the book, but rather that he's intimidated by its success and knows that he'll never get it quite that right again.
- Doing It for the Art: Jeff Bridges apparently volunteered to do the voice of Lír for free.
- Multiple Languages, Same Voice Actor: Christopher Lee, who was fluent in German, also voiced King Haggard in the German dub of the film.
- Promoted Fanboy: Christopher Lee was a huge fan of the book, to the point of bringing his own copy of the book to his recording and pointing out lines that he felt had to stay in the story. He also provides the voice in the German dub of the movie.
- Lee hoped to be able to play Haggard in any live-action adaptation until the end of his life, and fans agree he would have been awesome - to the degree that some feel such an adaptation should now never be made.
- Self-Adaptation: Peter S. Beagle wrote the script for the animated movie adaptation of his novel The Last Unicorn. Due to a notorious case of "Hollywood accounting," his share of the profits was much smaller than would seem fair.
- Throw It In!:
- The cat's pirate voice was ad-libbed by his voice actor who was having fun with all sorts of accents to give the cat, and everyone loved the stereotypical Long John Silver voice that they just had to go with it. They gave the cat an eyepatch and peg leg to match.
- "Have a taco" came about when Beagle was writing very late at night, when you start writing all sorts of strange things. However, he loved the line so much he had to leave it in, Anachronism Stew be damned.
- Wag the Director: A positive example. When Christopher Lee came in to work, he brought his own copy of the novel wherein he took note of lines that he believed should not be omitted.
- What Could Have Been:
- A live-action remake has been in Development Hell since 2005. Christopher Lee for a long time had expressed interest in reprising his role as King Haggard. Shortly before his death in 2015, he had given his blessing for them to cast someone else. Angela Lansbury had also expressed interest in reprising her role as Mommy Fortuna.
- The UK group Renaissance was considered to create the soundtrack before America came on board.
- Harrison Ford, Mark Hamill and Dustin Hoffman were considered voices for Schmendrick.
- John Carradine and James Earl Jones were considered voices for King Haggard.
- Michael Crawford, Richard Harris and Kurt Russell were considered voices for Prince Lír.
- Elizabeth Hartman and Janet Leigh were considered voices for the Unicorn/Amalthea.
- The Wiki Rule: The Last Unicorn Wiki.
Trivia / The Last Unicorn