Things You Never Knew About 'Big Bang Theory' (Including the Star Who Admitted to Hooking Up In Their Dressing Room)

No matter how many times you’ve watched The Big Bang Theory, we bet that there’s still so much that you don’t know about the hit series.

For instance, did you know that Sandra Bullock was supposed to appear on the show? Her role went to another very popular actor after her team sent a “polite decline” to the offer for a simple reason.

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.

One actor even admitted to using their dressing room for hooking up. 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…