8 Oldest Main Cast of the Big Bang Theory

8 Oldest Main Cast of the Big Bang Theory

Sitcoms are great! It gives us comfort after a long day of work or just life. You can just be there and not worry about anything and laugh. One such great show is The Big Bang Theory. This 2007-2019 series portrays the life of many relatable four socially awkward friends. When a show lasts over a decade, it is the utmost proof of the love the show received. 

Though it revolves around a few friends, there are a lot of characters in the show. This American sitcom has actors from all ages playing different characters. 

So, let us find out the ages of the main cast members to determine the oldest main cast of “The Big Bang Theory.”

8. Kaley Cuoco (Penny Teller)

Date of Birth: November 30, 1985
Nationality: American
Character Name: Penny Teller

Kaley Cuoco (Penny Teller)Photo Source

Kaley Cuoco, portraying Penny, added charm and humor to the series. Born on November 30, 1985, she was 21 years old when she began her acting career in Pasadena. Throughout the series, she underwent significant personal development in real life and her character as well.  By the time she and Leonard got together in the finale, she and Leonard had one of the most significant age gaps of any couple in the cast.

Fun Fact 

Before she committed to acting, Kaley Cuoco used to work at the Cheesecake Factory.

7. Kunal Nayyar (Raj Koothrappali)

Date of Birth: April 30, 1981
Nationality: British-Indian
Character Name: Raj Koothrappali

Kunal Nayyar (Raj Koothrappali)Photo Source

Kunal Nayyar, portraying Raj Koothrappali, was born on April 30, 1981, making him the second-youngest member of the group. Raj is an accomplished character, graduating from Cambridge University and becoming an astrophysicist. 

In The Big Bang Theory, he was the only main cast member still single at the show’s end, despite attending the Nobel Prize ceremony with Sarah Michelle Gellar.

Fun Fact 

Kunal Nayyar’s voice acting skills can be heard in animated shows and films like “Trolls” and “American Dad!

6. Melissa Rauch (Bernadette Rostenkowski)

Date of Birth: June 23, 1980
Nationality: American
Character Name: Bernadette Rostenkowski

Melissa Rauch (Bernadette Rostenkowski)Photo Source

Melissa Rauch, who played Bernadette, was born on June 23, 1980. Melissa started her acting career with various roles and stand-up comedy. She joined “The Big Bang Theory” in season three, known for her unique voice and her character’s journey from a microbiologist to a successful pharmaceutical executive.

Fun Fact 

Melissa Rauch co-wrote and starred in the 2015 comedy-drama film “The Bronze.”

5. Simon Helberg (Howard Wolowitz)

Date of Birth: December 9, 1980
Nationality: American
Character Name: Howard Wolowitz

Simon Helberg (Howard Wolowitz)Photo Source

Simon Helberg, who played Howard Wolowitz, was born on December 9, 1980. Howard’s character grew from a womanizer to a loving family man during the series. Simon’s comedy skills made Howard a beloved character.

However, by the end of the show, he got married, became a father to two children, worked on the Mars Rover, developed secret government projects, and became an astronaut, all before the age of 37.

Fun Fact 

In addition to his acting, Simon Helberg is a talented pianist and musician.

4. Johnny Galecki (Leonard Hofstadter)

Date of Birth: April 30, 1975
Nationality: American
Character Name: Leonard Hofstadter

Johnny Galecki (Leonard Hofstadter)Photo Source

Johnny Galecki, who played Leonard Hofstadter, was born on April 30, 1975. He nailed the role of Leonard, the lovable and slightly neurotic physicist. Johnny had a successful career in acting from a young age, and he fit into the character perfectly, contributing to the show’s success.

During the series, Leonard grew personally, became more self-assured, worked on important scientific papers, married Penny, and became a father at 38.

Fun Fact 

Johnny Galecki’s hobbies include playing the cello and enjoying vintage motorcycles.

3. Mayim Bialik (Amy Farrah Fowler)

Date of Birth: December 12, 1975
Nationality: American
Character Name: Amy Farrah Fowler

Mayim Bialik (Amy Farrah Fowler)Photo Source

Mayim Bialik, who played Amy Farrah Fowler, started in the third season and was about 30 years old. Amy, a respected neuroscientist, won a Nobel Prize in physics and had a special relationship with Sheldon. By the end of the series, she was around 40. 

She appeared briefly as an 11-year-old in the Young Sheldon Season 2 finale and had a voice-over cameo in Season 5, indicating she’s about 40 in the spin-off.

Fun Fact 

In real life, Mayim Bialik has a Ph.D. in neuroscience from UCLA.

2. Jim Parsons (Sheldon Cooper)

Date of Birth: March 24, 1973
Nationality: American
Character Name: Sheldon Cooper

Jim Parsons (Sheldon Cooper)Photo Source

Jim Parsons, portraying the iconic Sheldon Cooper, brought a prodigious genius with quirky humor to life. Sheldon had accomplished remarkable academic feats, including graduating from high school at the tender age of 11, completing college by 14, and obtaining a PhD at the impressively early age of 16. 

Sheldon grew as a person, learned to accept his friends’ quirks, and fell in love with Amy. At the age of 39, the character also won the Nobel Prize.

Fun Fact 

Jim Parsons reprised his role as Sheldon in the spin-off prequel series “Young Sheldon” as the narrator.

1. Kevin Sussman (Stuart Bloom)

Date of Birth: December 4, 1970
Nationality: American
Character Name: Stuart Bloom

Kevin Sussman (Stuart Bloom)Photo Source

Kevin Sussman, who played Stuart Bloom, the comic bookshop owner, was born on December 4 1970. Stuart starts as a recurring character but becomes a key part of the cast. Kevin’s acting and comedy skills enriched Stuart’s character, especially as he faced challenges in his romantic relationship with Denise and gained fame for his comic book store.

Fun Fact 

Kevin Sussman, who portrayed Stuart Bloom in “The Big Bang Theory,” is not just an actor but also a talented stand-up comedian.


The best part of sitcoms is that we feel like rewatching them over and over again because of the comfort they give us. Big Bang Theory is one such sitcom. People love the funny, quirky, and witty shows where we don’t have an apocalypse to worry about. 

These actors have paid justice to their roles in bringing their characters to life. They have blended well into their character development and become the show itself. True fans of the Big Bang theory know that there is no show without each of the actors. 

Regardless of the age difference, these actors had great chemistry. So, cheers to the oldest main cast of the Big Bang theory. And oh! The youngest, too!

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