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Amelia Mignonette Grimaldi Thermopolis Renaldo , also known as Mia Thermopolis, is a fictional character and the protagonist of The Princess Diaries novels by Meg Cabot. The story revolves around her diary, which she writes in religiously, and her relationships with her best friend Lilly Moscovitz, her long-time boyfriend and "the love of her life" Michael Moscovitz, her grandmother, and others. She is the heir to the throne of the fictional country, the Principality of Genovia, having been pushed into the title.

Mia Thermopolis
The Princess Diaries character
Princess mia.jpg
Mia as portrayed by Anne Hathaway in The Princess Diaries film.
First appearance Book Series:
The Princess Diaries
Movie Series:
The Princess Diaries
Last appearance Book Series:
Royal Wedding
Movie Series:
The Princess Diaries 2: Royal Engagement
Created by Meg Cabot
Portrayed by Anne Hathaway
Information
Aliases Mia Thermopolis
Occupation Book Series:
High School Student
Author

Movie Series:
High School Student
Queen of Genovia
Family Book Series:
Philippe, Sovereign Prince of Genovia (father)
Helen Thermopolis (mother)
Clarisse Renaldo, Dowager Princess of Genovia (grandmother)
Rupert Renaldo, Prince of Genovia (dead) (grandfather)
Olivia Grace Clarisse Mignonette Harrison Renaldo (half-sister)
Frank Gianini (step-father)
Rocky Thermopolis-Gianini (half-brother)

Movie Series:
Helen Thermopolis (mother)
Prince Philippe Renaldi (father; deceased)
Patrick O'Connell (step-father)
Trevor Thermopolis-O'Connell (half-brother)
Prince Pierre Renaldi (uncle;unseen in the movies)
Queen Clarisse Renaldi (grandmother)
King Rupert Renaldi (grandfather, dead, it is named in the second film)
Nationality American and Genovian

Amelia Mignonette Grimaldi Thermopolis Renaldo (Amelia Mignonette Thermopolis Renaldi in the film series), also known as Mia Thermopolis, is a fictional character and the protagonist of The Princess Diaries novels by Meg Cabot. The story revolves around her diary, which she writes in religiously, and her relationships with her best friend Lilly Moscovitz, her long-time boyfriend and "the love of her life" Michael Moscovitz, her grandmother, and others. She is the heir to the throne of the fictional country, the Principality of Genovia, having been pushed into the title.

In the books Mia lives in a loft in New York City with her mother, Helen Thermopolis, and her ginger cat, Fat Louie. Helen begins dating Mia's algebra teacher, Frank Gianini, during Mia's freshman year, and as the series develops Helen and Frank get married and have a child together. During the year she attends Albert Einstein High School, and spends her holidays at the Royal Palace in Genovia.