Jim Parsons has delivered exceptional performances in films like The Boys In The Band and Spoiler Alert. However, he is most famous for his role as Sheldon Cooper from The Big Bang Theory.

The Big Bang Theory cast has always expressed gratitude for the loyal fan base the show developed over the years. Running for 12 seasons, the show became one of the longest-running sitcoms in history.

Parsons took his appreciation of the fans to a whole new level when he was a guest on Conan O'Brien's talk show. After picking a fan out of the audience, Parsons took them on a tour of the set and gifted them an unexpected souvenir.

Jim Parsons Joked About Participating In The Tell-All 'Big Bang Theory' Book

Since The Big Bang Theory was such a huge success, it has attracted a large legion of fans around the world. Its success has also led to much interest in the show's behind-the-scenes secrets. This made Jessica Radloff's book "The Big Bang Theory: The Definitive, Inside Story" all the more necessary.

While appearing on The Tonight Show Starring Jimmy Fallon, Parsons talked about how he participated in over 20 hours of interviews with Radloff for the tell-all.

"Honestly, it was really the only way I thought it was worth doing, because I thought… if they're just going to talk for an hour or two, it's like, [what's the point?]," Parsons said.

"So I was like, 'Cool, let's do it.' And it was really interesting because it was sort of a decompression of those 12 years that I didn't realize how helpful that would be," he continued.

"Other people would jog memories when she'd come back to you with other questions," Parsons said. "They're like, 'They said…', I'm like, 'That's right, that happened' or whatever. It was cool. I had my own little box of what that time was in its own way. I know where all the bodies are buried, I like to say."

Jim Parsons Went From Actor To Producer After 'The Big Bang Theory'

When Parsons made his exit from The Big Bang Theory, it put an end to the series altogether. There were many who didn't understand or accept his decision, but it was clear Parsons wanted to pursue other projects.

In 2022, Parsons spoke with The Hollywood Reporter about his career after The Big Bang Theory. Parsons began by explaining how quickly he headed back to New York City after wrapping the series.

"We did our final performance on a Tuesday night," Parsons began. "On Wednesday, we did the handprints and stuff at Grauman's Chinese Theatre.

Thursday morning, I was on a plane out of L.A."

Part of Parsons' evolution following the series was going from actor to producer.

"I was not well versed enough in Hollywood machinations to know that, at some point during Big Bang renegotiations, this would be a thing — that part of one new deal was my own production company," Parsons said. "For what? I'd only been an actor."

He continued, "I looked at it as a gift, but I remember saying at the time that I didn't want to develop work for me. I didn't want to be another actor with a vanity project production company.

"

Parsons described producing the film A Kid Like Jake as a "headache" and said the fact that it was a low budget independent production contributed to that.

"I'm sure I'd feel differently now, but it was just more ragtag than I was comfortable with," he explained. "I didn't know where to look for support, and producing and acting at the same time was really challenging. Our production company was a smaller group then. Having six of us on staff has changed things."

Jim And Conan O'Brien Brought An Audience Member To The Set Of 'The Big Bang Theory'

Parsons was a guest on Conan in 2013 to promote the latest season of The Big Bang Theory.

During the interview, O'Brien complimented Parsons on the show's success. O'Brien mentioned how the show seemed to be getting bigger every year.

"We have really, really wonderful fans," Parsons said. "We always have. It's true"

"A lot of your fans are here tonight," O'Brien said.

Parsons then responded to that statement with a suggestion of his own.

"I was hoping and if this is okay with you, I did have an idea," Parsons began. "We tape [The Big Bang Theory] two doors down. If possible, I would love to take one of these people over to the set and I would like to get a souvenir from the set that you could have.

"

Parsons and O'Brien then walked into the audience to choose someone to bring with them. Parsons chose a woman named Judy.

"My mother's name is Judy!" Parsons told her.

As they walked toward the set, Parsons made conversation with Judy.

"Have you been watching [The Big Bang Theory] since the beginning?" he asked.

"Yes I have," Judy responded.

Parsons then led Judy and O'Brien to the apartment set where they found co-star Simon Helberg.

"We have to be frank with you, I feel a little awkward taking anything directly from the set that we might want to use," Parsons said.

Parsons then took off Helberg's shirt and handed it to Judy.

"If you don't mind, we'll take this instead," Parsons said as he took off the shirt. "And there's your souvenir from the set!"