Seth MacFarlane Peter Griffin , Brian Griffin , Stewie Griffin , Tom Tucker , The Chairman , Mr. Hale , Guillermo , Job Placement Counselor , Richard Nixon , Mayor McCheese , Merlin , Rabbit Doctor Voice, Executive Producer Alex Borstein Lois Griffin , Loretta Brown , Tricia Takanawa , Barbara Pewterschmidt , Additional Voices Voice Seth Green Chris Griffin , Neil Goldman , Additional Voices Voice Mike Henry Bruce the Performance Artist , Minstrel , Friar Voice Mila Kunis Meg Griffin Voice Lori Alan Diane Simmons Voice David Berry Additional Voices Guest Voice Johnny Brennan Mort Goldman Guest Voice Jackson Douglas Vacuum Repairman Guest Voice Charles Durning Francis Griffin Guest Voice R. Lee Ermey Coach Guest Voice Ralph Garman Gene Rayburn Guest Voice Jimmy Kimmel Death's Dog , Man in Suit , Renaissance Guy Guest Voice Justin Koznar Alfalfa , Kid 2 Guest Voice Rachael MacFarlane Barbara , Maid Madelaine Guest Voice Danny Smith Additional Voices Guest Voice Fred Tatasciore Chevy Chase Guest Voice Will Ferrell The Black Knight Guest Voice Phil LaMarr Ollie Williams , Pimp , Minister Guest Voice Adam Carolla Death Guest Voice David Zuckerman Executive Producer Michael Dante DiMartino Director Peter Shin Director Pete Michels Director