Simon "S." Morgenstern is the fictional author of The Princess Bride, and a native of the fictional country of Florin. Author William Goldman presents the novel as being an abridged version of Morgenstern's original tale by himself. In the film, the grandfather reads to his sick grandson from the original book by Morgenstern (no mention of Goldman at all).
- Goldman wrote another novel, The Silent Gondoliers, under the pen name of Morgenstern.
- The name may be a reference to Johann Carl Simon Morgenstern, who coined the term Bildungsroman, describing the genre of story.