| Picture
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Name
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Role in American Dad!
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Role on The Simpsons
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Lizzy Caplan
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Voice of Debbie Hyman.
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Voiced Virginia Johnson in "Kamp Krustier".
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Nancy Cartwright
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Provided the laugh for Bart Simpson in the episode "Faking Bad".
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Main cast member.
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Stephen Colbert
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Voiced Dr. R. Dandliker in "All About Steve".
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Voiced Colby Krause in "He Loves to Fly and He D'ohs".
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Zooey Deschanel
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Voiced two strippers in "Stan Knows Best".
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Voiced Mary Spuckler in "Apocalypse Cow", "Moonshine River" and "Love Is a Many-Splintered Thing", and herself in FOX's 25th Anniversary Special and Super Bowl Promo.
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John DiMaggio
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Had provided numerous voices on the show including characters in other episodes.
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Voice of Bender in the season 16 episode "Future-Drama", the season 26 crossover episode "Simpsorama" and The Simpsons Game.
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Carmen Electra
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Voiced Lisa Silver in the first episode "Pilot".
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Voiced herself in "The Frying Game".
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Stephen Fry
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Voiced Mr. Cavendish in "Big Stan on Campus".
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Voiced Terrance, Terrance's father, Hazel and the head of MI5 in "The Man from G.R.A.M.P.A.".
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Sarah Michelle Gellar
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Voiced Phyllis in "Virtual In-Stanity" and as Jenny in "Adventures in Hayleysitting"..
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Voiced Gina Vendetti in "The Wandering Juvie" and "Moonshine River".
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Brian George
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Voiced Ali, one of Stan's trio of Arab co-workers in "Stan of Arabia: Part 1".
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Voiced several British men in "The 7 Beer Itch" and "The Man from G.R.A.M.P.A.".
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Seth Green
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Voiced other various characters.
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Executive producer for Robot Chicken couch gag and voiced Chris in "The Simpsons Guy".
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Grey Griffin
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Had provided the voice for Toshi's sister Akiko in "Weiner of Our Discontent" and "Shallow Vows".
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Voice of Martin Prince and Sherri and Terri Mackleberry from Season 31 - Present.
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Jon Hamm
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Voiced himself in "Can I Be Frank (With You)".
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Voiced an FBI agent in "Donnie Fatso".
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Alyson Hannigan
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Voiced Chelsea in "Virtual In-Stanity" and one of the peasant daughters in "Finger Lenting Good".
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Voiced Melody Juniper in "Flaming Moe".
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Mike Henry
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Voice of Jackson.
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Voiced Cleveland Brown from Family Guy and in the crossover "The Simpsons Guy".
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Richard Kind
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Voice of Al Tuttle.
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Voiced A Christmas Ornament for Christmas director in the season 32 episode "A Springfield Summer Christmas for Christmas".
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Lisa Kudrow
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Voiced Michelle in "The Best Christmas Story Never".
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Voiced Alex Whitney in "Lard of the Dance".
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Jane Lynch
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Voiced other various characters in other episodes.
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Voiced Roz Davis in "Replaceable You" and Jeanie in "'Tis the 30th Season".
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Seth MacFarlane
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Creator of the show and voice of Stan Smith, Roger and Greg Corbin.
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Voiced Ben in "Dangers on a Train" and creator and actor of Family Guy and in the crossover "The Simpsons Guy".
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Michael McKean
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Voiced Emperor Zing in "Lost in Space".
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Voiced David St. Hubbins in "The Otto Show" and Jerry Rude in "Monty Can't Buy Me Love".
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Martin Mull
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Voice of Father Donovan.
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Voiced Seth in "D'oh-in' in the Wind".
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Kevin Michael Richardson
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Voice of Principal Brian Lewis and other characters.
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Has voiced many different characters in many episodes.
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Stephen Root
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Played the recurring role of Dick Reynolds in the following episodes before being replaced by another actor.
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Voiced Bildorf in the season 32 episode "Wad Goals".
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Sarah Silverman
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Voiced a cop stripper in "Stan Knows Best".
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Voiced Nikki McKenna in ""Stealing First Base" and "Moonshine River", herself in "Clown in the Dumps" and Rachel Cohen in "Treehouse of Horror XXVII".
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J. K. Simmons
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Provided assorted voices including Mr. McCreary in "The One That Got Away".
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Reprised his role as J. Jonah Jameson in "Moe'N'a Lisa", voiced a tabloid editor in "Homerazzi", JJ Gruff in the season 29 episode "3 Scenes Plus a Tag from a Marriage", Dr. Jessup in the season 30 episode "Daddicus Finch" and Victor Kleskow in the season 30 episode "Girl's in the Band".
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J. B. Smoove
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Voiced Leslie the airport security guard as well as his associate in multiple appearances and Tracey Bryant in "The Worst Stan".
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Voiced DJ Kwanzaa in the season 22 episode "Angry Dad: The Movie".
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Patrick Stewart
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Voice of Deputy Director Avery Bullock.
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Voiced Number One and himself.
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