voices that seth macfarlane does on family guy
List of Family Guy cast members Seth MacFarlane voices three of the show's main characters: Peter Griffin, Brian Griffin, and Stewie Griffin.[1] 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.[2] MacFarlane drew inspiration for the voice of Peter from a security guard he overheard talking while attending the Rhode Island School of Design.[3] Stewie's voice was based on the voice of English actor Rex Harrison,[4] especially his performance in the 1964 musical drama film My Fair Lady.[5] MacFarlane uses his own voice while portraying Brian.[2]