<P> Kunis was nominated for an Annie Award for voicing Meg Griffin in the season 5 episode "Barely Legal" and MacFarlane has also won an Emmy Award for Outstanding Voice - Over Performance and an Annie Award for Best Voice Acting in an Animated Television Production, though no other cast member has won an award for their work on the series . </P> <P> From seasons 1 to 4, Family Guy had four main cast members . Since season 5, there have been five main cast members . The casting of Meg Griffin changed after season 1 . </P> <P> Seth MacFarlane voices three of the show's main characters: Peter Griffin, Brian Griffin, and Stewie Griffin . MacFarlane chose to voice these characters himself, believing it would be easier to portray the voices he had already envisioned than for someone else to attempt it . MacFarlane drew inspiration for the voice of Peter from a security guard he overheard talking while attending the Rhode Island School of Design . Stewie's voice was based on the voice of English actor Rex Harrison, especially his performance in the 1964 musical drama film My Fair Lady . MacFarlane uses his own voice while portraying Brian . </P> <P> MacFarlane also provides the voices for various other recurring and one - time only characters, most prominently those of news anchor Tom Tucker, Lois' father Carter Pewterschmidt and Dr. Hartman . He is the only voice to be in every episode . </P>

Voices that seth macfarlane does on family guy