| Picture
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Name
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Role in The Big Bang Theory
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Role on The Simpsons
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Kareem Abdul-Jabbar
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Played himself in "The D&D Vortex".
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Voiced himself in the season 22 episode "Love Is a Many-Strangled Thing".
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Buzz Aldrin
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Played himself in "The Holographic Excitation".
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Voiced himself in the season 5 episode "Deep Space Homer".
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Christine Baranski
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Played Dr. Beverly Hofstadter in 16 episodes.
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Voiced herself in the season 33 episode "Portrait of a Lackey on Fire".
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Ed Begley, Jr.
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Played Dr. Linkletter on Young Sheldon.
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Voiced himself in the season 10 episode "Homer to the Max" and the season 20 episode "Gone Maggie Gone".
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Ellen DeGeneres
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Played herself in "The Geology Elevation" and "The Laureate Accumulation".
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Voiced herself in the season 21 episode "Judge Me Tender".
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Neil Gaiman
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Played himself in "The Comet Polarization".
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Voiced himself in the season 23 episode "The Book Job" and Snowball II in the season 29 episode "Treehouse of Horror XXVIII".
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Sarah Michelle Gellar
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Played herself in "The Stockholm Syndrome".
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Voiced Gina Vendetti in the season 15 episode "The Wandering Juvie" and the season 24 episode "Moonshine River".
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Brian George
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Played Dr. V. M. Koothrappali in 16 episodes.
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Voiced several British men in the season 32 episode "The 7 Beer Itch" and MI5 agents in the season 32 episode "The Man from G.R.A.M.P.A.".
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Sara Gilbert
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Played Leslie Winkle in several episodes.
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Voiced Laura Powers in the season 4 episode "New Kid on the Block".
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Mark Hamill
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Played himself in "The Bow Tie Asymmetry".
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Voiced himself and Leavelle in the season 10 episode "Mayored to the Mob".
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Stephen Hawking
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Played himself in several episodes.
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Voiced himself in the season 10 episode "They Saved Lisa's Brain", the season 16 episode "Don't Fear the Roofer", the season 18 episode "Stop, or My Dog Will Shoot!", and the season 22 episode "Elementary School Musical".
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James Earl Jones
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Played himself in "The Convention Conundrum".
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Voice of removalist, The Raven Narrator, Serak the Preparer in the season 2 episode "Treehouse of Horror", Maggie Simpson in the season 6 episode "Treehouse of Horror V" and the narrator in the season 9 episode "Das Bus".
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Jane Kaczmarek
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Played Dr. Gallo in "The Sales Call Sublimation".
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Voices Judge Constance Harm.
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Stan Lee
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Played himself in "The Excelsior Acquisition".
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Voiced himself in the season 13 episode "I Am Furious (Yellow)", the season 25 episode "Married to the Blob" and the couch gag for the season 28 episode "The Caper Chase".
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Christopher Lloyd
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Played Theodore in "The Property Division Collision".
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Voiced Doc Brown in The Simpsons Ride and Jim Ignatowski in the Season 26 episode "My Fare Lady".
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Jack McBrayer
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Played Randall in "The Conjugal Conjecture".
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Voiced Ewell Freestone in the season 22 episode "The Great Simpsina".
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Stephen Merchant
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Played Dave Gibbs in three episodes.
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Voiced CONRAD in the season 27 episode "The Girl Code".
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Elon Musk
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Played himself in The Big Bang Theory episode "The Platonic Permutation" and Young Sheldon episode ": "A Patch, a Modem, and a Zantac".
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Voiced himself in the season 26 episode "The Musk Who Fell to Earth".
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Bob Newhart
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Played recurring character Professor Proton in both The Big Bang Theory and Young Sheldon.
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Voiced himself in the season 7 episode "Bart the Fink".
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Jim Parsons
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Played main character Sheldon Cooper.
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Voiced himself in the season 31 episode "Frinkcoin".
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Brian Posehn
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Played recurring character Bert Kibbler the geologist.
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Voiced Dumlee in the season 28 episode "A Father's Watch"; also co-wrote the comic story Gnaws.
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Michael Rapaport
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Played Kenny Fitzgerald in "The Helium Insufficiency".
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Voiced Mike Wegman in the season 31 episode "Go Big or Go Homer" and the season 33 episode "Bart the Cool Kid".
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Stephen Root
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Played Dan in "The Locomotion Interruption" and "The Champagne Reflection".
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Voiced Bildorf in the season 32 episode "Wad Goals".
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Katey Sagal
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Played Susan in "The Conjugal Conjecture".
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Voiced Leela in Futurama crossover "Simpsorama".
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Jonathan Schmock
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Played Jonathan in "The Shiny Trinket Maneuver".
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Voiced the Johnny Bermuda salesman in the season 29 episode "King Leer".
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Wallace Shawn
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Played Dr. John Sturgis on Young Sheldon.
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Voiced Wallace the Hernia in the season 30 episode "I Want You (She's So Heavy)".
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Kevin Smith
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Played himself in "The Fortification Implementation" and "The D&D Vortex".
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Voiced himself in the season 31 episode "Highway to Well".
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Yeardley Smith
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Played an employment agency counselor in "The Einstein Approximation".
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Voices Lisa Simpson.
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Brent Spiner
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Played himself in "The Russian Rocket Reaction".
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Voiced the A9000 Robots in the season 23 episode "Them, Robot".
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George Takei
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Played himself in "The Hot Troll Deviation".
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Voiced Akira in the season 2 episode "One Fish, Two Fish, Blowfish, Blue Fish", Wink in the season 10 episode "Thirty Minutes Over Tokyo", waiter in the season 13 episode "A Hunka Hunka Burns in Love", sushi chef in the season 24 episode "What Animated Women Want" and himself in the season 27 episode "The Burns Cage".
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Teller
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Played Larry Fowler in 3 episodes of The Big Bang Theory and Pus on Young Sheldon episode "A Clogged Pore, a Little Spanish and the Future".
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Voiced himself in the season 11 episode "Hello Gutter, Hello Fadder" and the season 22 episode "The Great Simpsina".
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Neil deGrasse Tyson
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Played himself in "The Apology Insufficiency" and "The Conjugal Configuration").
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Voiced himself in the season 28 episode "The Caper Chase".
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Adam West
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Played himself in "The Celebration Experimentation".
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Voiced himself in the season 4 episode "Mr. Plow", the season 14 episode "Large Marge" and Family Guy's season 13 premiere The Simpsons' crossover "The Simpsons Guy".
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