‘Big Bang Theory’ Star Johnny Galecki Reveals an Eye-Opening Encounter With Kaley Cuoco (Photo)

CBS sitcom began its 12th and final season on Monday

Kaley Cuoco is going into the 12th and final season of “The Big Bang Theory” with wide-eyed anticipation.

At least that’s the conclusion to be drawn from a behind-the-scenes photo of Cuoco that her co-star Johnny Galecki shared on his Instagram account Monday, as the CBS sitcom prepared to launch its swan-song run.

“New and final season of @bigbangtheory_cbs starts TONIGHT!” Galecki wrote in accompaniment to the photo.

As the photo shows, Cuoco shared in Galecki’s enthusiasm. The photo depicts Cuoco with her eyes agog and mouth wide open, leaning over a railing as an appreciative audience applauds her antics.

Galecki, meanwhile, is capturing Cuoco’s funny-face moment on the camera of his own phone.

It was announced in August that the CBS sitcom will end its run following its current 12th season. Following the announcement, Cuoco took to Instagram to reflect that, regardless of when the sitcom wrapped up, “my heart would have always been broken in two.”

Cuoco, who included a photo of the cast with her post, added that she and her colleagues “are goin out with a bang.”

“This ride has been a dream come true and as life changing as it gets. No matter when it was going to end, my heart would have always been broken in two,” Cuoco wrote. “Drowning in tears, we promise to bring you the best season yet.

Clearly, Cuoco has found the strength to laugh — or at least make silly faces — between the tears.

See Galecki’s behind-the-scenes look below.

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New and final season of @bigbangtheory_cbs starts TONIGHT!

A post shared by Johnny Galecki (@sanctionedjohnnygalecki) on