Two nerdy physicists share an apartment and an unlikely friendship with their beautiful neighbor with whom one of them is infatuated. Like the universe after the big bang, the show's popularity expanded, thanks to breakout star Jim Parsons, along with the chemistry among the friends and the developing romance between Leonard and Penny. The addition of M (more…)
Johnny Galecki Leonard Hofstadter 293 Episodes (2007-2020)
Mayim Bialik Amy Farrah Fowler 293 Episodes (2007-2020)
Melissa Rauch Bernadette Rostenkowski 293 Episodes (2007-2020)
Simon Helberg Howard Wolowitz 293 Episodes (2007-2020)
Kunal Nayyar Rajesh Koothrappali 293 Episodes (2007-2020)
Kaley Cuoco Penny 293 Episodes (2007-2020)
Jim Parsons Sheldon Cooper 292 Episodes (2007-2020)
Kevin Sussman Stuart 241 Episodes (2008-2019)
Carol Ann Susi Debbie Wolowitz, Mrs. Wolowitz 204 Episodes (2007-2020)
Aarti Mann Priya, Priya Koothrappali 203 Episodes (2007-2020)
Sara Gilbert Instructor, Leslie Winkle 46 Episodes (2007-2019)
John Ross Bowie Barry Kripke, Kripke 26 Episodes (2009-2019)
Mark Harelik Dr. Eric Gablehauser, Gablehauser 21 Episodes (2007-2013)
Jason Kravits Danny 21 Episodes (2018-2019)
Vernee Watson Althea 20 Episodes (2007-2016)
Carol Ann Susi /Debbie Wolowitz, /Mrs. Wolowitz, /Mrs. Wolowitz (voice), Mrs. Wolowitz, Mrs.Wolowitz 20 Episodes (2007-2020)
Vernee Watson-Johnson Althea 20 Episodes (2007-2016)
Laura Spencer Ellen, Emily, Emily Sweeney 19 Episodes (2013-2017)
Christine Baranski Beverly, Dr. Beverly Hofstadter 18 Episodes (2009-2019)
Wil Wheaton Himself, Wil Wheaton 18 Episodes (2009-2019)
James Hong Chen 17 Episodes (2007-2008)
Laurie Metcalf Mary, Mary Cooper 16 Episodes (2007-2018)
Brian Posehn Bert, Bert Kibbler 14 Episodes (2013-2019)
Brian George Dr. Koothrappali, Dr. V. M. Koothrappali, Dr. V.M. Koothrappali 13 Episodes (2007-2019)
Joshua Malina le président Siebert, Präsident Siebert, Pres. Seibert, Presdient Siebert, President Siebert 12 Episodes (2011-2019)
Stephen Engel 12 Episodes (2007-2013)
Brian Thomas Smith Zach, Zack 12 Episodes (2010-2019)
Alice Amter Mrs. Koothrappali 11 Episodes (2007-2015)
Kate Micucci Lucy 9 Episodes (2013-2017)
Pamela Adlon Halley, Halley (O.S.), Halley Wolowitz 9 Episodes (2016-2019)
Rati Gupta Anu 9 Episodes (2018-2019)
Casey Sander Mike Rostenkowski, Mr. Rostenkowski 8 Episodes (2012-2015)
Pamela Adlon /Halley Wolowitz, Halley 8 Episodes (2016-2019)
Lauren Lapkus Denise 7 Episodes (2018-2019)
Richard Rosenstock 7 Episodes (2008-2013)
Anthony Del Broccolo 7 Episodes (2011-2019)
Michael Massimino Michael J. Massimino/Mike Massimino, Mike Massimino, Mike Massimino (as Mike Massimino NASA Astronaut), Mike Massimino (as Mike Massimino NASA Astronaut)/Mike Massi, Mike Massimino/Mike Massimino 7 Episodes (2012-2014)
Bob Newhart Arthur Jeffries, Prof. Proton, Prof. Proton/Arthur, Professor Proton 6 Episodes (2013-2018)
Regina King Janine Davis, Mrs. Davis 6 Episodes (2013-2019)
Dean Norris Col. Williams, Colonel Richard Williams 6 Episodes (2016-2017)
Riki Lindhome Dr. Ramona Nowitzki, Ramona, Ramona Nowitzki 6 Episodes (2008-2017)
Keith Carradine Wyatt 5 Episodes (2010-2019)
Stephen Hawking Himself, Stephen Hawking 5 Episodes (2012-2017)
Margo Harshman Alex 5 Episodes (2012-2013)
Alessandra Torresani Claire 5 Episodes (2016-2017)
Robert Clotworthy Announcer, Astronaut, Headmaster Edwards, Zugschaffner 4 Episodes (2008-2015)
Robert Clotworthy /Announcer, /Astronaut, /Train Conductor, Dave Roeger 4 Episodes (2008-2015)
Mike Massimino Himself 4 Episodes (2012-2014)
Anthony Del Broccolo 4 Episodes (2011-2019)
Jerry O'Connell George, Georgie 3 Episodes (2018-2018)
Kathy Bates Mrs. Fowler 3 Episodes (2018-2018)
Sara Rue Stephanie 3 Episodes (2008-2008)
Teller Larry Fowler, Mr. Fowler 3 Episodes (2018-2018)
Stephen Merchant Dave, Ethan 3 Episodes (2015-2015)
Ira Flatow Himself 3 Episodes (2009-2017)
Stephen Engel 3 Episodes (2007-2013)
Marcus Folmar Guard, Police Officer, Security Guard 3 Episodes (2010-2016)
Pasha D. Lychnikoff Dimitri, Dimitri (as Pasha Lychnikoff), Dimitri (as Pasha Lychnikoff)/Dimitri 3 Episodes (2012-2012)
Pasha Lychnikoff Dimitri 3 Episodes (2012-2012)
Andy Gordon 3 Episodes (2017-2018)
Elena Campbell-Martinez Cleaning Lady, Maria 3 Episodes (2008-2015)
Josh Brener Dale 3 Episodes (2011-2013)
Richard Rosenstock 3 Episodes (2008-2013)
Brian Patrick Wade Kurt 3 Episodes (2007-2009)
Courtney Henggeler Missy 2 Episodes (2008-2018)
Dakin Matthews Santa 2 Episodes (2012-2014)
Ellen DeGeneres Ellen DeGeneres 2 Episodes (2016-2019)
Jim Meskimen Doctor/Man, Minister 2 Episodes (2015-2015)
Judd Hirsch Alfred, Dr. Alfred Hofstadter 2 Episodes (2016-2016)
Kal Penn Dr. Campbell, Dr. Kevin Campbell 2 Episodes (2019-2019)
LeVar Burton Himself 2 Episodes (2012-2014)
Sean Astin Dr. Greg Pemberton, Dr. Pemberton 2 Episodes (2019-2019)
Stephen Root Dan 2 Episodes (2014-2014)
Katee Sackhoff Herself 2 Episodes (2009-2010)
Lance Barber George Sr., Jimmy 2 Episodes (2011-2018)
Tim Doyle 2 Episodes (2008-2009)
Bill Nye Himself 2 Episodes (2013-2018)
Alex Ball Waiter 2 Episodes (2013-2014)
Bruce Peterson 2 Episodes (2007-2009)
George Smoot Himself 2 Episodes (2009-2019)
Howard Murray 2 Episodes (2011-2011)
Katie Leclerc Emily 2 Episodes (2011-2017)
Michelle Arthur Mrs. Petrescu 2 Episodes (2016-2018)
Molly Morgan Bethany, Hostess 2 Episodes (2009-2015)
Robert Wu Tam 2 Episodes (2018-2018)
Lindsey Kraft Marissa 2 Episodes (2019-2019)
Analeigh Tipton Analeigh, Vanessa 2 Episodes (2008-2015)
Saladin K. Patterson 2 Episodes (2015-2017)
David Theune Dr. Graybel 2 Episodes (2018-2019)
Andrea Roth 1 Episode (2009)
Bill Murray Dr. Peter Venkman 1 Episode (2014)
Billy Bob Thornton Dr. Oliver Lorvis 1 Episode (2014)
Brent Spiner Himself 1 Episode (2011)
Carrie Fisher Herself 1 Episode (2014)
Charlie Sheen Charlie Sheen 1 Episode (2008)
Christopher Lloyd Theodore 1 Episode (2016)
D.J. Qualls Toby, Toby Loobenfeld 1 Episode (2008)
Eliza Dushku FBI Agent 1 Episode (2010)
Eric Nenninger Neil 1 Episode (2019)
George Takei 1 Episode (2010)
George Wyner Dr. Zhang 1 Episode (2017)
James Earl Jones Himself 1 Episode (2014)
Jane Kaczmarek 1 Episode (2016)
Jennifer Hale News Announcer 1 Episode (2008)
Jennifer Hale /News Announcer 1 Episode (2008)
Jessica Walter Mrs. Latham 1 Episode (2011)
Jim Holmes Tim 1 Episode (2016)
Jim Meskimen Doctor/Man 1 Episode (2015)
Jodi Lyn O'Keefe Mikayla 1 Episode (2009)
Joel Brooks Professor Goldfarb 1 Episode (2008)
Joel Murray Doug 1 Episode (2008)
Judy Greer Dr. Elizabeth Plimpton 1 Episode (2010)
Kareem Abdul-Jabbar Himself 1 Episode (2019)
Kareem Abdul-Jabbar 1 Episode (2019)
Katey Sagal Susan 1 Episode (2016)
Ken Lerner Dr. Schneider 1 Episode (2012)
Kevin Smith Himself, Kevin Smith 1 Episode (2015)
Kevin Smith Himself 1 Episode (2015)
Laurie Metcalf /Mary Cooper 1 Episode (2007)
Leonard Nimoy Mr. Spock 1 Episode (2012)
Leonard Nimoy Spock 1 Episode (2012)
Mark Hamill Himself 1 Episode (2018)
Mark Harmon Leroy Gibbs in "NCIS" 1 Episode (2014)
Matt Battaglia Officer Reynolds 1 Episode (2013)
Michael Hyatt Charlotte 1 Episode (2008)
Michael Rapaport Kenny 1 Episode (2015)
Michael Trucco David 1 Episode (2008)
Michael Weatherly Anthony DiNozzo in 'NCIS' 1 Episode (2014)
Peter MacNicol Doctor Wolcott 1 Episode (2018)
Peter Onorati Angelo 1 Episode (2012)
Robert Noble Older Gentleman 1 Episode (2014)
Sarah Michelle Gellar Sarah Michelle Gellar 1 Episode (2019)
Stacey Travis Sandy 1 Episode (2011)
Stephen Hawking Himself 1 Episode (2012)
Steve Valentine Kenneth 1 Episode (2014)
Susan Chuang Dr. Harris 1 Episode (2017)
Susanna Thompson Army Lt. Col. Hollis Mann in 'NCIS' 1 Episode (2014)
Troy Winbush Paramedic No. 2 1 Episode (2013)
Walton Goggins Oliver 1 Episode (2018)
Wil Wheaton 1 Episode (2009)
Wil Wheaton 1 Episode (2009)
William Shatner Himself 1 Episode (2019)
William Shatner 1 Episode (2019)
Yeardley Smith Sandy 1 Episode (2010)
Jonathan Schmock Jonathan 1 Episode (2012)
Andrew Walker Mike 1 Episode (2008)
Danica McKellar Abby 1 Episode (2010)
Eddie Shin Dr. Park 1 Episode (2018)
Elizabeth Bogush Dr. Catherine Millstone 1 Episode (2009)
Julio Oscar Mechoso Officer Hackett 1 Episode (2010)
Meagen Fay Mrs. Rostenkowski 1 Episode (2012)
Nathan Fillion Customer 1 Episode (2015)
Summer Glau Herself 1 Episode (2009)
Travis Schuldt Eric 1 Episode (2008)
Lance Barber 1 Episode (2011)
Michael Dempsey Security Guard 1 Episode (2015)
Patrika Darbo Grace 1 Episode (2015)
Eric Petersen Eric 1 Episode (2014)
Brooke Dillman Bebe 1 Episode (2019)
Brian Greene Himself 1 Episode (2011)
John Mendoza Chauffeur 1 Episode (2012)
Tania Raymonde Yvette 1 Episode (2014)
Oliver Muirhead Professor Laughlin 1 Episode (2009)
Todd Giebenhain Mitch 1 Episode (2019)
Paul Wilson Prof. Thorne 1 Episode (2014)
Ronald Hunter Dan 1 Episode (2008)
Meagan Fay Mrs. Rostenkowski 1 Episode (2012)
Paul Willson Professor Sharpe 1 Episode (2014)
Steve Paymer Judge Taylor 1 Episode (2010)
Eileen Galindo Letty 1 Episode (2018)
Lewis Black Professor Crawley 1 Episode (2009)
Brooke D'Orsay 1 Episode (2007)
Adam Gregor Dimitri 1 Episode (2008)
Ajgie Kirkland Louie 1 Episode (2010)
Alison Martin Andrea 1 Episode (2018)
Allen Nabors Doug 1 Episode (2007)
Andre Boyer Kwame 1 Episode (2019)
Andrew Hill Newman Albert Einstein 1 Episode (2013)
Angela Sargeant Lana 1 Episode (2013)
Annie O'Donnell Mrs. Fowler 1 Episode (2010)
Annie O'Donnell Mrs. Lorvis 1 Episode (2010)
April Bowlby Rebecca 1 Episode (2017)
Bill Gates Himself 1 Episode (2018)
Buzz Aldrin Himself 1 Episode (2012)
Charlotte Newhouse Joy 1 Episode (2010)
Chip Chinery Bob The Boat Neighbor 1 Episode (2019)
Christopher Neiman Dr. Dreyfus 1 Episode (2014)
Chuck Carter Stan 1 Episode (2008)
Craig Gellis Car Thief #1 1 Episode (2013)
Craig Welzbacher Candidate #1 1 Episode (2015)
Cynthia Holloway 1 Episode (2007)
David Barrera Officer Hernandez 1 Episode (2014)
Doreen Calderon Woman #1 1 Episode (2019)
Eddie Braun 1 Episode (2008)
Edward James Gage Mailman 1 Episode (2018)
Emma Degerstedt Emma 1 Episode (2008)
Endre Hules /Russian Mission Control (voice) 1 Episode (2012)
Erin O'Reilly Cheryl 1 Episode (2008)
Frank Alvarez Car Thief #2 1 Episode (2013)
George Smoot 1 Episode (2009)
Hira Ambrosino Cynthia 1 Episode (2019)
Howard Chan 1 Episode (2008)
Ian Reed Kesler Paramedic No. 1 1 Episode (2013)
Jane Galloway Heitz Mildred 1 Episode (2009)
Joe Manganiello Himself 1 Episode (2019)
Joe Manganiello 1 Episode (2019)
John Apicella Archimedes 1 Episode (2013)
Josh Zuckerman Marty 1 Episode (2016)
Judith Moreland Jan 1 Episode (2008)
June Squibb Meemaw 1 Episode (2016)
Karl T. Wright Jimmy 1 Episode (2012)
Kevin Brief Glen 1 Episode (2010)
Kimberly Kevon Williams 1 Episode (2007)
Kurt Scholler Judge #1 1 Episode (2018)
Lauri Johnson Mrs. Gunderson 1 Episode (2010)
Livia Trevino Lourdes 1 Episode (2008)
Louise Claps Receptionist 1 Episode (2015)
Malcolm Foster Smith Roy 1 Episode (2014)
Mark Barrett Security Guard No. 2 1 Episode (2015)
Mark Berry Pit Boss 1 Episode (2018)
Mark Hames Tom 1 Episode (2008)
Matt Bennett Josh Wolowitz 1 Episode (2015)
Michael Patrick McGill Police Officer 1 Episode (2017)
Monica Garcia Maria 1 Episode (2014)
Neil deGrasse Tyson Himself 1 Episode (2018)
Neil deGrasse Tyson 1 Episode (2018)
Noel De Souza Older Indian Man 1 Episode (2015)
Octavia Spencer Octavia 1 Episode (2008)
Rachel Cannon Patty 1 Episode (2007)
Sandra Marquez Woman 1 Episode (2008)
Sara Erikson Gwen 1 Episode (2015)
Sarah Buehler Sarah 1 Episode (2009)
Sergio Enrique Son 1 Episode (2008)
Shane Blades Customer 1 Episode (2016)
Sophie Oda Grace 1 Episode (2013)
Steve Wozniak Himself 1 Episode (2010)
Susan Leslie Woman #6 1 Episode (2019)
Tiffany Dupont Angela 1 Episode (2011)
Todd Eric Andrews Dr. Gunderson 1 Episode (2013)
Treisa Gary Waitress 1 Episode (2007)
Valerie Azlynn Alicia 1 Episode (2009)
Wayne Wilderson Travis 1 Episode (2015)
William Stanford Davis Dry Cleaner 1 Episode (2012)
Jack McBrayer Randall 1 Episode (2016)
Giovanni Bejarano Bellman 1 Episode (2018)
Bob Stephenson Wendell 1 Episode (2018)
Becky O'Donohue Becky 1 Episode (2012)
Creagen Dow Maitre D' 1 Episode (2016)
Matt Knudsen Waiter 1 Episode (2018)
Nicole J. Butler Clerk 1 Episode (2017)
Ryan Cartwright Cole 1 Episode (2012)
Tate Ellington Mitchell 1 Episode (2015)
Daniel Levitin Professor in Cafeteria 1 Episode (2014)
James Maslow Bartender 1 Episode (2018)
Piper Mackenzie Harris Girl No. 1 1 Episode (2013)
Parvesh Cheena Marcus 1 Episode (2018)
Maribeth Monroe Dr. Lee 1 Episode (2018)
Jareb Dauplaise Jeff 1 Episode (2016)
Beth Behrs Nell 1 Episode (2018)
Blake Anderson 1 Episode (2016)
Lanny Joon Officer Shin 1 Episode (2011)
Steven Yeun Sebastian 1 Episode (2010)
Diamond White Girl No. 2 1 Episode (2013)
Neil Gaiman Himself 1 Episode (2018)
Kelli Goss Chelsea 1 Episode (2015)
Melissa Tang Mandy Chow 1 Episode (2015)
Tucker Albrizzi Christopher 1 Episode (2016)
Sarayu Rao 1 Episode (2007)
Kikey Castillo Leslie 1 Episode (2018)
Megan Heyn Natalie 1 Episode (2015)
Chasty Ballesteros Karen 1 Episode (2019)
Rachna Khatau Kathleen 1 Episode (2018)
Brandon Jones The Flash 1 Episode (2016)
Marissa Cuevas Danielle 1 Episode (2017)
Lexie Contursi Girl 1 Episode (2014)
Beau Casper Smart Travis 1 Episode (2014)
Ciara Renee Sunny Morrow 1 Episode (2018)
Barak Hardley Pizza Delivery Guy 1 Episode (2013)
Rena Strober Caller 1 Episode (2015)
Rena Strober /Caller 1 Episode (2015)
Dusan Brown Jeremy 1 Episode (2012)
H. Michael Croner Andre 1 Episode (2016)
Kip Thorne Himself 1 Episode (2019)
Kimberly Hebert Gregory Ms. Davora 1 Episode (2014)
Courtney Ford Alice 1 Episode (2011)
Sarayu Blue Lalita Gupta 1 Episode (2007)
Doug Morency Stranger 1 Episode (2017)
Jadon Sand Aaron 1 Episode (2012)
Bryan Safi Daniel 1 Episode (2016)
Max Mittelman Tech Support 1 Episode (2015)
Max Mittelman /Tech Support 1 Episode (2015)
Iain Armitage Young Sheldon 1 Episode (2018)
Iain Armitage 1 Episode (2018)
Montana Jordan Georgie 1 Episode (2018)
Montana Jordan 1 Episode (2018)
Dawson Fletcher Justin 1 Episode (2013)
Ellie Reed Jenna 1 Episode (2018)
Craig Duda Delivery Man 1 Episode (2007)
Katherine Von Till Tech Support Recording 1 Episode (2015)
Katherine Von Till /Tech Support Recording 1 Episode (2015)
Casper Smart Travis 1 Episode (2014)
Briana Cuoco Gretchen 1 Episode (2013)
Alfredo Tavares le patron du planetarium 1 Episode (2019)
Christine Corpuz Woman 1 Episode (2013)
Amanda Payton 1 Episode (2016)
Rod Keller Customer 1 Episode (2014)
Michael Croner Andre 1 Episode (2016)
Kaliko Kauahi Marta 1 Episode (2014)
Bill Prady 293 Episodes (2007-2020)
Chuck Lorre 293 Episodes (2007-2020)
Steven V. Silver 214 Episodes (2007-2020)
Maria Ferrari 86 Episodes (2009-2020)
Anthony Del Broccolo 7 Episodes (2011-2019)
Bill Prady 293 Episodes (2007-2020)
Chuck Lorre 293 Episodes (2007-2020)
Anthony Del Broccolo 44 Episodes (2011-2019)
Anthony Rich 43 Episodes (2010-2020)
Kelly Lee 2 Episodes (2009-2009)
David Litt 2 Episodes (2007-2008)
Richard Partlow 2 Episodes (2009-2015)
Anthony Joseph Rich 2 Episodes (2011-2015)
Joel Murray 1 Episode (2008)
Mark Cendrowski 264 Episodes (2007-2020)
Robert Cohen 1 Episode (2007)
Steven Molaro 91 Episodes (2007-2020)
Lee Aronsohn 56 Episodes (2007-2020)
Nicole Lorre 39 Episodes (2008-2020)
Stephen Engel 35 Episodes (2007-2013)
Bruce Peterson 23 Episodes (2007-2009)
Richard Rosenstock 13 Episodes (2008-2013)
Saladin Patterson 8 Episodes (2015-2017)
Stephen Engel 6 Episodes (2007-2013)
Robert Cohen 6 Episodes (2007-2008)
Tim Doyle 3 Episodes (2008-2009)
Andy Gordon 1 Episode (2017)
Toti Levine 1 Episode (2007)
Steve Holland 31 Episodes (2009-2020)
Howard Murray 2 Episodes (2011-2011)
Richard Rosenstock 23 Episodes (2008-2013)
Eric Kaplan 20 Episodes (2008-2020)
Eddie Gorodetsky 18 Episodes (2011-2020)
Maria Ferrari 18 Episodes (2009-2020)
Steve Holland 20 Episodes (2009-2020)
Jim Reynolds 20 Episodes (2009-2020)
Peter Chakos 20 Episodes (2007-2020)
Steve Holland 18 Episodes (2009-2020)
Jim Reynolds 18 Episodes (2009-2020)
Maria Ferrari 18 Episodes (2009-2020)
Richard Rosenstock 9 Episodes (2008-2013)
Saladin K. Patterson 8 Episodes (2015-2017)
David Litt 7 Episodes (2007-2008)
Stephen Engel 6 Episodes (2007-2013)
Eddie Braun 5 Episodes (2008-2009)
Robert Cohen 4 Episodes (2007-2008)
Andy Gordon 4 Episodes (2017-2018)
Brian George 2 Episodes (2007-2019)
Howard Murray 2 Episodes (2011-2011)
Anthony Joseph Rich 2 Episodes (2011-2015)
Joel Murray 1 Episode (2008)
Andrew D. Weyman 1 Episode (2007)
Tim Doyle 11 Episodes (2008-2009)
Anthony Del Broccolo 10 Episodes (2011-2019)
Savage Steve Holland 6 Episodes (2016-2018)
Savage Steve Holland 6 Episodes (2016-2018)
Saladin K. Patterson 6 Episodes (2015-2017)
Bob Koherr 1 Episode (2007)
Andrew D. Weyman 1 Episode (2007)
Steven Silver 1 Episode (2011)
Saladin K. Patterson 6 Episodes (2015-2017)
James Burrows 2 Episodes (2007-2013)
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