 The show is about growing up, in the beginning Lizzie and Miranda (played by: Hilary Duff, and Lalaine Vergara-Paras) buy their first bras. And towards the series ending they will be saying good bye to their Junior school. Matt, Lizzie s little bro, played by Jake Thomas is hilarious. He makes Lizzie s life seem worse than it really is. Kate Sanders, played by Ashley Briaullt, makes her school and sometimes personal life seem like hell.