Sixteen-year-old Poppy Moore (Emma Roberts) has always got what she wanted and lives a pampered life in her L.A. world. Though she's handed credit cards with unlimited balances and surrounded by countless hangers on, Poppy can't escape the mounting frustration she feels with her family situation and she makes sure everyone knows it. After an over-the-top prank pushes her father (Aidan Quinn) one step too far, Poppy is shipped off to an England/English boarding school.Finding herself in a foreign world of early curfews, stern matrons, and mandatory lacrosse, the United States|American princess has finally met her match: a school of British girls who won't tolerate her rebellious ways. Under the watchful eye of the school's headmistress (Natasha Richardson) and surrounded by a new circle of friends (Josie, Kate, KiKi & Drippy), Poppy begrudgingly realises her bad-girl behavior will only get her so far. But just because she must grow into a fine young lady doesn't mean this Wild Child won't be spending every waking hour shaking up a very proper system. Poppy Moore starts Abbey Mount as she means to go on-her way,or no way.

Raised in the African bush country by her zoologist parents, Cady Heron thinks she knows all about the "survival of the fittest". But the law of the jungle takes on a whole new meaning when the home-schooled 15-year old enters public high school for the first time. Trying to find her place between jocks, mathletes, and other subcultures, Cady crosses paths with the meanest species of all - the Queen Bee, aka the cool and calculating Regina George, leader of the school's most fashionable clique, the Plastics. When Cady falls for Regina's ex-boyfriend Aaron Samuels, though, the Queen Bee is stung - and she schemes to destroy Cady's social future. Cady's own claws soon come out as she leaps into a hilarious "Girl World" war that has the whole school running for cover.