Speculations that “Big Bang Theory” will not be renewed after season 10 continue to build up after rumors that two of its lead stars – Kaley Cuoco and Johnny Galecki – are leaving the hit TV show.

The buzz about Cuoco and Galecki not returning stemmed from the fact that their contracts are set to expire by the end of season 10, Parent Herald reported. Rumors have it that there are no plans for contract renewal  since the negotiations between CBS and Warner Bros do not seem very favorable.

Cuoco and Galecki play the role of on-screen couple Penny and Leonard, respectively. In March, Cuoco told TVLine that she is more than willing to reprise her role in the future seasons of “Big Bang Theory.” In fact, she hinted that she will be on the show for as long as it takes.

“I think it’s a given that we want to be here. That’s the overall consensus. It might be a sticky road, but if I have anything to do with it, we’d be here for much longer. That’s the goal,” Cuoco said.

The rumors that the CBS hit series will end after season 10 first came out when executive producer Steven Molaro hinted as such in an interview last December. According to Molaro, he had already some ideas on how to conclude the entire show.

“I can’t speak to the future or on behalf of the cast or where we’ll be then but it’s certainly possible that it could go past that,” Molaro told The Hollywood Reporter.

“The reality is that maybe season 10 is the ending point. The real answer is I don’t know and all I can do right now is go episode to episode and try to make each one the best that we can,” he added.

“Big Bang Theory” season 10 is set to premiere on Oct. 14, 2016 on CBS.