Kaley Cuoco says she's 'thrilled' with where Penny ends up in 'The Big Bang Theory' series finale (Exclusive)

Kaley Cuoco has cried her way through the final days of production on The Big Bang Theory, but she held it together at Wednesday's series finale event!

"I might be cried out, if that's possible," Cuoco joked with ET's Nischelle Turner on the red carpet. "It's been an unbelievable couple days."

"There [have been] a lot of tissues," the actress emotionally admitted. "It started with reading that initial script, and then last night shooting it in front of the audience, and this morning with the hands at Mann's Chinese [Theatre]. It's just been a beautiful tribute to our show. I don't know, I just feel so grateful. It's been a gift, a gift of 12 years."

The cast shot their final episode of Big Bang's 12-season run on Tuesday night, and on Wednesday, the stars were honored with a handprint ceremony at the TCL Chinese Theatre in Hollywood. But Cuoco confessed that the emotional journey started with some concerns over how the CBS comedy's creative team would wrap up the beloved characters' stories in a way that paid tribute to both the stars and the show's devoted fanbase.

"This has been a stress for months [for] us actors, and the writers -- how's this gonna end?" she recalled. "This is my legacy of this character, on and on."

But those fears were more than assuaged by the emotional two-part finale, which Cuoco called "amazing." "It is the most beautiful finale I have ever seen, and I love finales," she raved. "It is so touching. You're gonna cry, but in the sweetest way. I don't know how to describe it, other than it's absolutely the sweetest thing in the world."

"I'm thrilled with [Penny's] ending, yet beginning," Cuoco added. "It's beautiful. There's not anything catastrophic, it's just beautiful. And the characters are gonna live on in your minds and in your hearts, and I think that's what is so special about it. It's really touching."

As for the possibility of a future spin-off, reboot or revival series, Cuoco isn't quite ready to sign on, but admitted that there is one person she would consider an offer from.

"The only person I would say yes to is [Big Bang creator and executive producer] Chuck Lorre," she said. "So if Chuck came and said let's do it, I'd say yes. Other than that, I don't see a spin-off for myself. But I don't like to say no to Chuck. So if he wanted it, I'm in!"

At their handprint ceremony at the Chinese Theatre, Cuoco gushed over her time on the show, and her fellow co-stars, saying, "This is the greatest cast in the world. I feel so honored to be up here."

She also opened up about the finale, saying, "It's an incredibly touching final two episodes. I think we can say that. It's unbelievably special."

'The Big Bang Theory' stars on Instagram after final taping
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'The Big Bang Theory' stars on Instagram after final taping
Final group scene 💕 That’s a wrap 😭 @bigbangtheory_cbs
knock, knock, knock, thank you... Thank you, apartment 4A, for being a home to so many dreams come true, to so many friendships made. And thank YOU, ALL of you - yes, YOU, reading this right NOW! As we get ready to tape our final episode tonight, to walk in and out of this apartment door for the last time, it is hard to find the words to articulate what a profound experience this has been. But the words “love” and “gratitude” come to mind... so love and gratitude to all of you. ALL of you. Thank you. ❤️ (oh! and happy birthday to @sanctionedjohnnygalecki and @kunalkarmanayyar - talk about good timing... may your next 12 years be as vibrant and wonderful as the last 12 years in which i’ve had the pleasure to know and work with you both 🎉)
It is an overwhelming day to say the least. All of the feelings: gratitude, sadness, joy, excitement, grief...it's the end of a huge part of our lives and the beginning of who knows what. Thank you to the millions of people who love this show. Thank you for the lessons we have learned from you all. Thank you to our writers for caring so very much about these characters you all believe in and trust. Thank you for making our family a part of your family's laughter, tears, and challenges. I get to play dress up for a living and I am so honored to be a part of this cast, this crew, this staff, and this wonderful show about how these brilliant characters live, think, and love. It all started with a big bang. ❤️💥
#SimonHelberg and I have logged so many hours talking about acting and theater and film and everything we’re passionate about and have been blessed to be able to do for a living. One of the funniest people I’ve ever met, on screen and off. With all the phenomenal success of the show, Simon’s passion for the work has never changed. Still exploring. Still asking questions. Still doing spot on impressions of Christopher Walken that make you spit your milk out. Love this guy.
💛 Forever 💛 @kaleycuoco @kunalkarmanayyar @missmayim @therealjimparsons @sanctionedjohnnygalecki #simonhelberg
Thank you Thank you for your words Thank you for your encouragement Thank you for tuning in night in and night out Thank you for the stories you shared about how this show made you feel Thank you too, for the not so nice times Thank you, for lifting us up when we were down Fame can feel like a cage, so Thank you for making us feel safe enough to be free. Thank you for letting me share my birthday on stage with my six best friends, And Thank you, for you, because without you- there would be no us. So this goes out to you, the fans... One last time. In love and gratitude, -Kunal
💫 Final bows tonight 💫 @bigbangtheory_cbs
This set. Getting packed up. 😭
You know you work with wonderful and extremely thoughtful people when they celebrate your June birthday along with today’s birthdays (@kunalkarmanayyar @sanctionedjohnnygalecki ) because you won't be together when it comes around this summer. 📸 by the lovely and talented: @ansleyrix
While Stuart may have taken up residence in the Wolowitz household @kevsussman took up residence in a special place in my heart 💕 #Repost @kevsussman with @get_repost ・・・ The friends you make along the way... One of the best things about showing up to Stage 25 all these years has been seeing @themelissarauch ‘s smiling face.
Leonard Hofstadter, PhD.
Do @kaleycuoco and I look like we’re keeping it together? Took this right before our final speed read. Before our final taping. Before my final emotional breakdown. Gonna miss working with Kaley so much. Sometimes you get to work with an actor that's so thoroughly in the moment that you can look to them at any time to ground you - Kaley has been that for me for eleven years. ❤️
Gonna miss napping next to @missmayim. We nap in adjacent dressing rooms, so we simulated what that would look like if you removed the wall. Did I mention that Mayim’s room is also where I’ve had some of my most productive psychotherapy sessions? Thank you Dr. Bialik. ❤️

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