Olivia Grace Clarisse Mignonette Harrison is a completely average twelve-year-old, who was a half orphan who has never met her father and is forced to live with her aunt and uncle. Then one completely average day, a limo containing Princess Mia Thermopolis of Genovia pulls up to invite her to New York to finally meet her father, who promptly invites her to come live with him, Mia, Grandmere and her two fabulous poodles. Maybe Olivia Grace Clarisse Mignonette Harrison isn't so average after all!