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HOLLYWOOD, CALIFORNIA - MARCH 16: (L-R) Actors Mayim Bialik, Jim Parsons, Kaley Cuoco, and Johnny Galecki attend The Paley Center For Media's 33rd Annual PALEYFEST Los Angeles ÔThe Big Bang Theory' at Dolby Theatre on March 16, 2016 in Hollywood, California. (Photo by Matt Winkelmeyer/Getty Images)

The most watched sit-com on TV today, is “The Big Bang Theory.” Even if you’ve seen every episode, there may be some facts you’re unaware of.

When the creators of “The Big Bang Theory” went to pitch their idea to network executives, they actually performed the script in front of them. Clearly, that worked.

When told by his agent of the audition, Jim Parsons misunderstood and thought it was a game show.

Click here to read all 13 smart facts about “The Big Bang Theory.”