"The only manner in which the cast has discussed wrapping [the show] has been that we're all going to be very sad when that day comes," Galecki said to E! News about when the show might end at the 2018 Television Critics Association Winter Press Tour.
"But I think at this point everyone's very comfortable with 12 seasons being a good time to go home and see our families," he continued.
"The Big Bang Theory" was renewed for two more seasons in March, with the currently ongoing 11th season debuting in September.
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