== Plot ==
Princess Rosalinda María Montoya Fioré is about to be crowned queen of the small nation of Costa Luna. However, her coronation rehearsal is interrupted by General Magnus Kane, the dictator of neighboring country, Costa Estrella, who invades her palace with his agents during her coronation rehearsal, and attempts to capture the royal family and take over the country. Major Joe Mason, an agent of the Princess Protection Program (P.P.P.), a secret organization funded by royal families that looks after endangered princesses, whisks her away to safety via helicopter. Kane's agents, however, succeed in capturing her widowed mother, Queen Sofía Fioré of Costa Luna.
The Princess Protection ProgramP.P.P. hides Rosalinda in Joe's home in Lake Monroe, [[Louisiana]], where she meets his teenage daughter, Carter, an insecure tomboy who works at the family bait shop and dreams of going to the homecoming dance with her crush, Donny, although her classmate, Ed, secretly has a crush on her. Rosalinda poses as "Rosie Gonzalez", Carter's "cousin from [[Iowa]]". Though Carter initially treats her with hostility, she warms up to her after Rosie explains her situation, and the two become best friends. Carter teaches Rosie to act like the average American teenager, and RosalindaRosie shows Carter how to disarm those that scorn them, especially resident mean girls, Chelsea Barnes and Brooke Angels. Rosie soon becomes popular at their high school.
In an attempt to trick RosalindaRosie into exposing her ___location, General Kane announces plans to forcibly marry her motherSofía. Having learned Rosie's identity from a magazine, Brooke threatens to expose her unless she drops out of the vote for homecoming queen. Rosie reads of the pending nuptials in the magazine and tells Carter that she has decided to return home. Knowing Costa Luna is still too dangerous, Carter secretly devises a plan to pose as RosalindaRosie and use herself as bait to lure Kane into capture. Carter calls Mr. Elegante, Rosie's royal dressmaker and friend, for help with her plan. He tells Kane that Rosie will be attending the homecoming dance and plans to wear a Caribbean blue dress – he actually sends it to Carter, and gives Rosie a pale pink one. In the meantime, Rosie agrees to stay for the dance.
In order to help make the event special, a group of friends, including Rosie and Carter, wear masks to the dance, helping Carter disguise herself as Rosie. According to plan, Kane and his agents mistake Carter for RosalindaRosie and lead her to Kane's helicopter. However, after winning the homecoming queen title despite Chelsea and Brooke's efforts, Rosie discovers and ruins the plan by exposing herself to Kane, insisting to Carter that it is not her fight. Luckily, P.P.P. agents of the Princess Protection Program, including Major Mason, have been waiting inside the helicopter and rescue both girls. The P.P.P. agents quickly apprehend Kane and his henchmen and turn them over to the international authorities. Rosie is crowned queen with Carter, Joe, Ed, Sofía, and Mr. Elegante in attendance.
==Cast==
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