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With a long history and a dedicated fandom to this day, The Big Bang Theory is still captivating the world years after it went off air.

However, even the most adoring fans might not know all of the behind-the-scenes secrets from the beloved sitcom.

For instance, did you know that Sandra Bullock was supposed to land a role in it?

Revolving around Jim Parsons, Kaley Cuoco, Johnny Galecki, Simon Helberg and Kunal Nayyar, so much happened onscreen, but it turns out that just as much was going on when fans weren’t watching.

We did some digging and rustled up 12 facts about the show, including details about guest stars who turned down roles (that list includes a massive pop star), actors who were almost overlooked, onset romances, future plans for reboots and more.

Take a look and let us know what, if anything surprised you!

Scroll through the slideshow to check out 12 big secrets from the set of The Big Bang Theory…

Running for 12 seasons across as many years, there’s no denying that The Big Bang Theory is a fan-favorite TV show that still has a dedicated following in 2023.

However, even the most adoring fans might not know all of the behind-the-scenes secrets from the beloved sitcom.

Revolving around Jim Parsons, Kaley Cuoco, Johnny Galecki, Simon Helberg and Kunal Nayyar, so much happened onscreen, but it turns out that just as much was going on when fans weren’t watching.

We did some digging and rustled up 12 secrets from the show, including details about guest stars who turned down roles (that list includes a massive pop star), actors who were almost overlooked, onset romances, future plans for reboots and more.

Take a look and let us know what, if anything surprised you!

Scroll through the slideshow to check out 12 big secrets from the set of The Big Bang Theory…

The Big Bang Theory was almost a very different show.

A lot of fans of the show know that before Kaley Cuoco was cast as Penny, it was Amanda Walsh who played the female lead, Katie.

However, after the pilot was shot and presented to the network, the character of Katie and a few other elements weren’t perceived that well.

That’s when the show was reworked a bit, and Kaley was cast as Penny, and according to former CBS executive Nina Tassler, it was Kaley who helped the show make it to the air.

Keep reading to find out more…More Here! »

Ever since Kaley Cuoco announced her big news, we’ve been wondering just what the other stars of The Big Bang Theory are doing now.

Kaley starred opposite Jim Parsons, Johnny Galecki, Melissa Rauch, Mayim Bialik, Simon Helberg, Kunal Nayyar and Kevin Sussman in the Chuck Lorre led series.

The Big Bang Theory, which ended in 2019, centered on friends Leonard, Sheldon, Raj and Howard, scientists who had a bit of trouble navigating social situations outside of the lab. But thanks to their next door neighbor Penny, they figure it out.

Click inside to see what the cast of The Big Bang Theory has been up to since the series ended…

Kaley Cuoco and Johnny Galecki played a couple on screen for The Big Bang Theory, and it likely came easy for them, since they were secretly dating in real life.

The duo started going out in 2008 before going their separate ways in 2010. However, they kept their relationship largely under wraps.

They explained why during a recent interview.

Click inside to find out why the couple kept their romance private…

Kunal Nayyar is revealing some behind-the-scenes details about working on the set of The Big Bang Theory.

The actor, who played Raj Koothrappali, spoke about his experience on the show in an interview on Sunday Brunch, via The Independent.

Click inside to read more…More Here! »

Kaley Cuoco is getting candid about her career, as well as her personal life.

The 35-year-old actress opened up in an interview with Variety.

PHOTOS: Check out the latest pics of Kaley Cuoco

Here’s what she had to say…

On what she thought after learning The Big Bang Theory would come to an end: “’Oh, my God, I don’t remember my life before this show! And I went through a divorce on the show,’ she adds, referring to her abbreviated first marriage to Ryan Sweeting, in which, Cuoco says, ‘we got married in, like, six seconds.’”

On earning the same as her male counterparts on The Big Bang Theory: “I knew that I was equal to them from day one. And that was never questioned in my experience with Big Bang — which I will always appreciate, because it set a standard for me.”

On what to expect from the second season of The Flight Attendant: “The timetable for Season 2 is still coming together. Yes, there will be a mystery, Cuoco says, and yes, Cassie might work with the CIA, as the finale established. But Cuoco wants to tell the story of Cassie struggling in sobriety. ‘She thinks this is going to be quick and easy, and I’m nailing this!’ Cuoco says. ‘And she’s going to learn really fast that this is a lifelong issue that will not be cured for her overnight.’”

On the number of dogs she owns: “I’m not allowed to say how many I have, because I am afraid they will come knocking, saying that it’s an illegal amount.”

Find out why Kaley Cuoco said life was “boring” before meeting this person.

For more from Kaley, head to Variety.com.