●The film is adapted from the novel of the same name. Although the girls in the film are classmates, there is a big gap between their ages in real life. Bianca's actor Mae Whitman is eight years older than Madison's Bella Thorne; Annabella Avrey Thorne . Not only Madison, but other actors who play students are basically about eight years younger than Whitman.
●The role of Madison in the film does not exist in the original novel. It is just a role set when the script is written. Jacob Sullivan had visited the scene to guide the filming of the film.
●Bella Thorne, the actor of Madison in the film; Annabella Avrey Thorne was once a Disney child star well-known to the audience, this is her work when she grows up.
●The location of the story is set in a high school in the United States. "DUFF" refers specifically to those fat and ugly friends around me, and it also means "green leaves"
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