See Cuoco's reaction to the news, as another report says the end is all Jim Parsons' fault.
Warner Bros. Television, CBS and Chuck Lorre Productions announced the show's final season on Wednesday, promising "an epic creative close" to the long-running sitcom.
After the news broke, Cuoco went to Instagram to share her emotions and thank all the show's dedicated fans. "This ride has been a dream come true and as life changing as it gets," she wrote, alongside a photo of her with Johnny Galecki, Jim Parsons, Melissa Rauch, Kunal Nayyar, Mayim Bialik and Simon Helberg.
"No matter when it was going to end, my heart would have always been broken in two," she continued. "Drowning in tears, we promise to bring you the best season yet. To the fans, our crew, families, Chuck Lorre, Warner Brothers, CBS, and everyone who has supported us for so many years, thank you."
She also promised that "We are goin out with a bang."
Her message comes amid a report from Entertainment Weekly that the show's end was due, in part, to Parsons' desire to step away from the series.
While the actor himself has not commented, EW reports CBS was trying to negotiate a new two-year deal with the cast that would net them $50 million each if they stayed on. But Parsons, reportedly, "was ready to say goodbye."
Parsons is the only lead actor on the show to win an Emmy for his performance, racking up four trophies for Outstanding Lead Actor in a Comedy Series so far.
The season premiere will air Monday, September 24, before shifting back to its regular time period on Thursday that same week.