Hattie is one of the antagonists in Ella Enchanted. She is the daughter of Dame Olga, stepdaughter of Sir Peter, older sister of Olive and older stepsister of Ella. In the book, she is the only character to be obsessed with Prince Charmont and being a queen; in the film, she is the president of the Prince Char Fan Club.
In the book and in the film, she comes from a wealthy family. In the film, she lived in Lamia (in the book, the kingdom is called Kyrria) before moving to Frell when her mother remarried.
Hattie is a spoiled and unkind girl.