UPDATED with Jim Parsons and Mayim Bialik reactions: With the announcement Wednesday that The Big Bang Theory‘s upcoming Season 12 would be its last, the show’s cast began to share their reactions on social media and star Kaley Cuoco was among the first.

“This ride has been a dream come true and as life changing as it gets,” Cuoco wrote on Instagram. “No matter when it was going to end , my heart would have always been broken in two. 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. We are goin out with a bang.”

Jim Parsons on Thursday wrote a lengthy post on Instagram, saying he’s “terribly grateful” for the cast “who are all my playmates.” He also thanked fans, crew and the show’s writers, who “without them, there would literally be no Big Bang Theory at all, ever.” His post can be found in its entirety at the bottom.

Mayim Bialik shared her thoughts on her personal website Grok Nation, part of which is below.

“Am I happy? Of course not,” Bialik wrote. “This has been my job since Melissa Rauch and I joined the cast as regulars in season 4. I love my job. I love my castmates, and I feel such appreciation for our incredible crew, our brave writers, our entire staff, and our amazing fans. So many people are a part of our Big Bang family.”

“My paying job — the one you know me for — is ending and yes: It’s very sad,” she continued. “I fear it’s going to be very hard to not cry every day for the next 23 episodes! But, as a cast, we love bringing joy to our viewers and we will continue to do that to the best of our collective ability.”

When it completes its run, The Big Bang Theory will rank as the longest-running multi-camera series in television history per WBTV, spanning 12 seasons and a record-breaking 279 episodes.

“We are forever grateful to our fans for their support of The Big Bang Theory during the past twelve seasons. We, along with the cast, writers and crew, are extremely appreciative of the show’s success and aim to deliver a final season, and series finale, that will bring The Big Bang Theory to an epic creative close,” WBTV, CBS and Chuck Lorre Productions said Wednesday in a joint statement.

Reactions from Cuoco, Kunal Nayyar,John Ross Bowie and Parsons follow below.

Jim Parsons: “It is hard (really impossible, actually) to really accept that this is a picture of the first of the final 24 episodes we will shoot for The Big Bang Theory. I feel very fortunate that we have another 23 episodes to shoot this season because I am hopeful that with each and every one, my level of REALLY accepting this fact will sink in. Something else I feel grateful for – and this gratitude needs no time to “sink in” or become more “realized”; this grateful-feeling is always with me but is multiplied in this moment of us announcing our final season – but I feel such intense gratitude for our devoted viewers who are the ACTUAL reason we have been graced with the opportunity to explore these characters for 12 years of our lives.

I feel grateful to our crew – many, many of those who have been with us since day one – and who are the people who bring a sense of steadiness and dependability, who are so warm and kind and always quick to say hello and smile at us every time we come to the set and who, even though you don’t see them on TV, are in many ways the real and steady heartbeat that keeps this body of work alive and breathing while we, like flailing arms and legs, act like jackasses and fools in attempt to make someone laugh.

I am grateful to all the writers of our show – those with us now and those that have come and gone, because without them, there would literally be no Big Bang Theory at all, ever. The writers thought of this show, the writers created these characters, the writers are the ones who found ways to keep coming up with organic, entertaining ways to keep the life of this show going which is a task much, much more challenging than anyone other than them will ever know or understand. And while I know that they already know it, it bears repeating again: I am so terribly grateful for the cast in this picture and the cast members who aren’t pictured here – whether they were in one scene or many episodes along the way; you are all my playmates that I have fallen in love with and who have become a part of my life on set and off. You are my playmates when we don’t feel like playing but have to because it’s our job to get out there and communicate and pretend we’re these other fictional people and we look into each other’s eyes and say these words and end up creating this weird, other reality that has enriched my life more than I will ever fully understand.

I will miss all of you and all of this more than I can say and more than I can know at this time.”