Bazinga, can you believe it's been 15 years since The Big Bang Theory premiered?!
On Sept. 24, 2007, the Chuck Lorre and Bill Prady-created sitcom about a beautiful aspiring actress moving in across the hall from two nerdy physicists debuted on CBS and was an instant hit, eventually becoming TV's most watched comedy. Fans couldn't get enough of the laughs, the cast, including Kaley Cuoco, Jim Parsons and Johnny Galecki, or the show's beloved couples—Penny and Leonard, Amy and Sheldon, oh my!
And, of course, the romance wasn't just happening on-screen. Cuoco and Galecki quietly embarked on a relationship in 2008, the former couple recently revealing that they were feeling the same will-they-or-won't-they tension their characters were experiencing in the beginning of the series.
"All the scenes up until we actually got together in real life, it was obvious there was always something there," Kaley told Vanity Fair in a book excerpt from the new oral history, The Big Bang Theory: The Definitive, Inside Story. "There was chemistry, and we were crushing on each other. That was the whole first season until we actually got together for real."
