Garry Marshall Director Julie Andrews Queen Clarisse Renaldi Actor Anne Hathaway Mia Thermopolis Actor Héctor Elizondo Joe Actor Heather Matarazzo Lilly Moscovitz Actor Mandy Moore Lana Thomas Actor Caroline Goodall Mia's Mom, Helen Actor Robert Schwartzman Michael Moscovitz Actor Patrick Flueger Student Jeremiah Hart Actor Sean O'Bryan Teacher Mr. O'Connell Actor Sandra Oh Vice Principal Gupta Actor Kathleen Marshall Charlotte Kutaway Actor Meg Cabot Writer Gina Wendkos Screenwriter Debra Chase Producer Whitney Houston Producer Mario Iscovich Producer Karl Walter Lindenlaub Cinematographer Mayne Berke Production Design Bruce Green Film Editing Gary Jones Costume Design John Debney Original Music Dawn Soler Music Supervisor Ellen H. Schwartz Co-Producer, First Assistant Director Marcia Ross Casting Donna Morong Casting Gail Goldberg Casting Margaret Hilliard Unit Production Manager Casey Hallenbeck Set Decoration Caty Maxey Art Director