Big Bang Theory star says "no-one has any interest" in another spin-off once show ends 

Game of Thrones season 8: Everything you need to...

I\'m a Celeb 2018: Who\'s going into the jungle?

Strictly Come Dancing unveils Christmas 2018...

Cuoco says Big Bang\'s end was "definitely a surprise" Cuoco says Big Bang\'s end was "definitely a surprise"

Kaley Cuoco reveals huge Big Bang Theory secret Kaley Cuoco reveals huge Big Bang Theory secret

Ayda Field missed out on Big Bang Theory to Kaley Cuoco Ayda Field missed out on Big Bang Theory to Kaley Cuoco

Here\'s which Modern Family star is top-paid TV actress Here\'s which Modern Family star is top-paid TV actress

Every trailer released at New York Comic Con 2018 Every trailer released at New York Comic Con 2018

Bake Off fans loved THIS more than food on Liam\'s show Bake Off fans loved THIS more than food on Liam\'s show

Danny\'s Strictly partner cries after he skips interview Danny\'s Strictly partner cries after he skips interview

Strictly fans think AJ "faked" applause for Danny Strictly fans think AJ "faked" applause for Danny

How\'s Doctor Who *actually* doing so far, ratings-wise? How\'s Doctor Who *actually* doing so far, ratings-wise?

Arrow: 7 huge questions we have about the flashforwards Arrow: 7 huge questions we have about the flashforwards

Fans "fuming" with Simon Cowell after X Factor vote Fans "fuming" with Simon Cowell after X Factor vote

The new Sabrina is getting a Christmas special The new Sabrina is getting a Christmas special

is ending but, despite its popularity, don\'t expect another spin-off.

Johnny Galecki, who plays Leonard on the CBS sitcom, quashed any talk of the show continuing in the form of an offshoot series with any of the current cast (in addition to prequel series

), explaining that there is no discussion to be had if Jim Parsons isn\'t continuing as Sheldon.

"Oh, absolutely not," the actor said (via

). "The show could not continue without Jim."

"They are very different situations," he said. "But I can tell you that no-one has any interest [in a spin-off]."

Co-star Kaley Cuoco, who plays Penny, also said that she initially struggled to come to terms with the show coming to an end.

"I sobbed and sobbed and sobbed and could not form words," she shared. "We all did. The entire cast were all together and everyone cried for about 30 straight minutes. We all hugged. It was kind of crazy."

Galecki added: "I\'m getting emotional now talking about it.

"I don\'t think anyone was in disagreement about [the show ending], but that doesn\'t mean that it was an easy conversation. There were a lot of tears and a lot of hugs. But even if we took the show to season 35, that conversation is inevitable and still would have been just as difficult and emotional."

Want up-to-the-minute entertainment news and features? Just hit \'Like\' on our Digital Spy Facebook page and \'Follow\' on our @digitalspy Instagram and Twitter account.

Game of Thrones spin-off The Long Night might\'ve cast two more major roles

Chilling Adventures of Sabrina is returning to Netflix for a Christmas special

Kaley Cuoco reveals huge Big Bang Theory secret

Ayda Field missed out on Big Bang Theory to Kaley...

Here\'s which Modern Family star is top-paid TV...

Every trailer released at New York Comic Con 2018

Bake Off fans loved THIS more than food on Liam\'s...

Danny\'s Strictly partner cries after he skips...

Arrow: 7 huge questions we have about the flashforwards

Robert Durst: Has The Jinx subject been found guilty?

Stranger Things star announces filming wrap on season 3

Walking Dead will explain Maggie\'s absence this season

What\'s better than one fierce female character? A whole world of them.

Thrones spin-off might\'ve cast two more major roles

Will these actors be joining Naomi Watts?

Criminal Minds season 15: Everything you need to know

Game of Thrones\' spin-offs: Everything you need to know

Game of Thrones season 8: Everything you need to know

Big Bang Theory star has another idea for a spin-off

The Big Bang Theory star Jim Parsons reveals how he picked his mini-me for spin-off Young Sheldon

Big Bang Theory star Kaley Cuoco would have stayed for another 20 years

Johnny Galecki says The Big Bang Theory cast are "very comfortable" with the show ending after season 12

The Big Bang Theory creator reveals which guest star campaigned to appear on the show

The Big Bang Theory star Mayim Bialik admits show ending is "really weird"