When Kaley Cuoco and Johnny Galecki first started flirting on the set of , it was more than just acting. Though Johnny was initially oblivious, Kaley's affections soon became clear, and the two began a secret relationship that lasted for two years. To many, this romance was a shock, but one cast member wasn’t surprised at all—Simon Helberg. His observations on their chemistry were eerily accurate, and he had a front-row seat to all the behind-the-scenes drama.

Despite their efforts to keep their relationship under wraps, their on-screen chemistry as Penny and Leonard became more and more undeniable. Fans speculated, and eventually, the truth came out. However, the couple's hesitation wasn’t just about public opinion; they feared it would create tension on set. Simon, however, found the whole situation more amusing than anything.
"It was hilarious, really," he shared in an interview. "The gravity given to their relationship was intense, but for me, it was just a matter of time.
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