The Big Bang Theory Cast

Last Modified Mar 6, 2025 07:01 EST
The Big Bang Theory
The Big Bang Theory (Source: Instagram)


The Big Bang Theory is one of the biggest comedy sitcoms in America and across the globe. The show, which premiered on September 24, 2007, has earned a huge fan following over its 12 years delivering 12 spectacular seasons and a total of 279 episodes. Chuck Lorre and Bill Prady created the show under CBS and Warner Bros. Television, which serve as the distribution partners of the show.


The Big Bang Theory is a show based on the lives of friends who live in Pasadena, California. The show mainly revolves around two highly knowledgeable scientists, Leonard Hofstadter and Sheldon Cooper, who navigate friendships, romantic relationships, and the challenges of everyday life with entertaining humor and memorable scenes that have kept the audience quite entertained throughout its 12 seasons.


The Big Bang Theory Cast


Across the 12 seasons of The Big Bang Theory, we have seen 6 main characters, multiple guests, and minor characters. Let's check them out.


Main Characters


  1. Johnny Galecki as Leonard Hofstadter


Leonard Hofstadter
Leonard Hofstadter ( Source: Instagram)


American television and movie actor Johnny Galecki is seen playing Leonard Hofstadter who is an experimental physicist with an IQ of 173. The character is known to have a PhD at the young age of 24 and is seen as a geek who loves video games, comic books, and Dungeons & Dragons. Over the series, we see Leonard having a relationship with neighbor Penny who is also one of the main characters in the series.


  1. Jim Parsons as Sheldon Cooper


Sheldon Cooper
Sheldon Cooper (Source: Instagram)


Jim Parsons plays the role of the child prodigy Sheldon Cooper. Sheldon has an IQ of 187 and is known to be a theoretical physicist researching quantum mechanics and string theory. Jim has received various awards, like four Primetime Emmy Awards and the Golden Globe Award for Best Actor, for portraying the character.


  1. Kaley Cuoco as Penny


Penny
Penny (Source: Instagram)


Another main character from the show, Penny is played by American actress Kaley Cuoco. Penny lives opposite Leonard and Sheldon’s home. Penny's character is known to work as a waitress and a bartender at The Cheesecake Factory. In the series, Penny is seen becoming friends with Leonard and Sheldon and ends up in a relationship with Leonard, ultimately marrying him.


Related: Who Plays Penny On The Big Bang Theory


  1. Simon Helberg as Howard Wolowitz


Howard Wolowitz
Howard Wolowitz (Source: Instagram)


Simon Helberg is known to play the role of Howard Wolowitz who is recognized as one of the best friends of Leonard, Rajesh, and Sheldon. Amongst his friends, Howard is the only guy who does not have a PhD and is often mocked for it by his friends. Still an aerospace engineer, Howard worked as an astronaut and went into space as a payload specialist at the International Space Station. Over the course of the series, we see Howard in a relationship with Bernadette.


  1. Kunal Nayyar as Rajesh Koothrappali


Rajesh Koothrappali
Rajesh Koothrappali (Source: Instagram)


Kunal Nayyar is seen playing the role of Rajesh Koothrappali who hails from New Delhi, India. Is known to be a particle astrophysicist and has a PhD as similar to Sheldon and Leonard. One interesting thing about his character is that Rajesh is only able to talk to ladies under the influence of alcohol.


  1. Melissa Rauch as Bernadette Rostenkowski-Wolowitz


Bernadette Rostenkowski-Wolowitz
Bernadette Rostenkowski-Wolowitz (Source: Instagram)


American actress Melissa Rauch is seen playing the role of Bernadette Rostenkowski-Wolowitz who, in the initial phase of the series, was seen as a side character. Seeing her story and chemistry with Howard Wolowitz, Bernadette was promoted to be a part of the main cast from season 4 to season 12.


  1. Mayim Bialik as Amy Farrah Fowler


Amy
Amy (Source: Instagram)


Amy Farrah Fowler is played by American actress Mayim Bialik. Her character introduction to the show started as a supporting cast who was selected as a partner for Sheldon Cooper from an online dating site. While in the beginning, Amy and Sheldon are seen quite clueless about their relationship, the two end up getting married by the end of the show. Amy's character is known to have a Ph.D. in neurobiology.


Other Characters


Sr No.CharactersActor/ Actress
1Althea RobinsonVernee Watson
2KurtBrian Patrick Wade
3Eric GablehauserMark Harelik
4Mrs. WolowitzCarol Ann Susi
5V. M. KoothrappaliBrian George
6Mrs. KoothrappaliAlice Amter
7Ramona NowitzkiRiki Lindhome
8Stephanie BarnettSara Rue
9Barry KripkeJohn Ross Bowie
10Beverly HofstadterChristine Baranski
11Wil WheatonWil Wheaton
12Zack JohnsonBrian Thomas Smith
13Mrs. FowlerAnnie O'Donnell (Season 4)
Kathy Bates ( Seasons 11 and 12)
14Priya KoothrappaliAarti Mann
15WyattKeith Carradine
16President SiebertJoshua Malina
17Mike RostenkowskiCasey Sander
18Dimitri RezinovPasha Lychnikoff
19Alex JensenMargo Harshman
20Janine DavisRegina King
21LucyKate Micucci
22Bert KibblerBrian Posehn
23Arthur JeffriesBob Newhart
24DanStephen Root
25Dave GibbsStephen Merchant
26ClaireAlessandra Torresani
27Alfred HofstadterJudd Hirsch
28Colonel Richard WilliamsDean Norris
29RuchiSwati Kapila
30DeniseLauren Lapkus
31Mr. FowlerTeller
32AnuRati Gupta
33Tam NguyenRobert Wu
34Marissa JohnsonLindsey Kraft
35Dr. Kevin CampbellKal Penn
36Dr. Greg PembertonSean Astin
37Victoria MacElroyValerie Mahaffey
38Tom PetersenRex Linn
39Hubert GivensBrian Stepanek
40Evelyn IngramDanielle Pinnock
41Coach Wayne WilkinsDoc Farrow
42Sheryl HutchinsSarah Baker
43Herschel SparksBilly Gardell
44PegNancy Linehan Charles
45Brenda SparksMelissa Peterman
46GlennChris Wylde
47John SturgisWallace Shawn
48Paige SwansonMckenna Grace
49Linda SwansonAndrea Anders
50Veronica DuncanIsabel May
51RobinMary Grill
52Dr. Grant LinkletterEd Begley Jr.
53Dale BallardCraig T. Nelson
54Jana BoggsAva Allan
55Pastor RobDan Byrd


Read more about The Big Bang Theory:


Where can i watch the big bang theory

How much did the big bang theory actors make

Who is the highest paid actor in the big bang theory

The big bang theory awards

FAQ's On The Big Bang Theory Cast

 A. The Big Bang Theory ended on May 16, 2019.

 A. There are 12 seasons aired of The Big Bang Theory.

 A. No, the actors playing Leonard and Penny, Johnny Galecki and Kaley Cuoco, are not married in real life but have maintained a great relationship together.

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