Kaley Cuoco (C) accepts the award for favorite network TV comedy series with the cast and crew of "Big Bang Theory" at the People's Choice Awards 2016 in Los Angeles, California January 6, 2016. Reuters/Mario Anzuoni

“The Big Bang Theory” may lose some or all of its main stars. The show might be in trouble as it enters its 10th season as bosses reportedly try to renew the contracts of some the sitcom’s biggest stars.

The show will kick off its 10th season in September. However, as The Hollywood Reporter says, none of the regular cast members are signed beyond season 10. Sources say the cast -- Jim Parsons (Sheldon), Johnny Galecki (Leonard), Kaley Cuco (Penny), Simon Helberg (Howard), Kunal Nayyar (Raj), Mayim Bilaik (Amy), and Melissa Rauch (Bernadette) -- are all seeking a pay rise from their contracts two years ago when the show was picked up for a three-season renewal.

The contract talk won’t impact production as the stars are already filming for season 10. But the fate of season 11 appears to be doomed right now. The show will not really be what it is, if it loses even one of the main characters.

One of the creators, Steve Molaro, spoke to THR about the show and said, “All we can do right now is focus on season 10 and go script by script, which is what we would be doing anyway. We don’t really arc out stories too far, and we let things happen organically, and if things catch us by surprise, if it feels right, we go with it.”

When asked what would happen if one of the main stars were to quit over the negotiations, he said that he would definitely feel weird and different. He also said that if he had a couple of episodes of advance writing, he is certain he could do something meaningful. However, he hoped it doesn’t come to that.