Seth MacFarlane Peter Griffin , Brian Griffin , Stewie Griffin , Glenn Quagmire , Tom Tucker , Leonardo da Vinci , Additional Voices Voice, Executive Producer Alex Borstein Lois Griffin , Stephanie Voice Seth Green Chris Griffin Voice Mila Kunis Meg Griffin Voice Mike Henry Cleveland Brown Voice Joe Flaherty Vatican Messenger Guest Voice Wallace Shawn Bertram Guest Voice Danny Smith Additional Voices Guest Voice Alec Sulkin Additional Voices Guest Voice John Viener Additional Voices Guest Voice David Zuckerman Executive Producer Dominic Polcino Director Peter Shin Director