<B>Originally played by:</B> Rachael MacFarlane and Lacey Chabert (inset, top).<br/><br/><B>Replaced by:</B> Mila Kunis (inset, bottom).<br/><br/><B>The substitution:</B> <I>Family Guy</I>'s socially challenged Meg Griffin was originally voiced by Seth MacFarlane's sister, Rachael MacFarlane, for the show's pilot episode way back in 1999. She was then replaced by <I>Mean Girls</I> star Lacey Chabert for <I>Family Guy's</I> first season, who was in turn replaced by <I>That '70s Show</I>'s Mila Kunis in season two. There's no secret scandal behind Chabert's dismissal &mdash; MacFarlane just felt Kunis is "more right" for the character.