 Mila Kunis and Lacey Chabert have both voiced Meg Griffin . Chabert left the series because of time conflicts with schoolwork and her role on Party of Five . When Kunis auditioned for the role , she was called back by MacFarlane , who instructed her to speak slower . He then told her to come back another time and enunciate more . Once she claimed that she had it under control , MacFarlane hired her . 
