It was love at first sight for Leonard but he wouldn't officially get the girl until the beginning of 'Big Bang's third season.It was a different story offscreen: The couple managed to date quietly for the first two years of the show, with no one the wiser until they broke up.She arrived at the 2014 People's Choice Awards with a rock on her left ring finger and left carrying another: the Poeple's Choice Award for favorite comedic TV actress.
PHOTOS: Hottest hookups of 2012 Although the movie and TV stars are keeping the romance hush-hush for now, Cuoco dropped a major hint to her 1.4 million Twitter followers June 14: Tweeting a photo of herself gazing adoringly at a costar Johnny Galecki — she and Galecki, 36, kept their two-year romance completely under wraps.24, 2007, Cuoco debuted as Penny, the female lead in CBS' 'The Big Bang Theory.' Her character, the next-door neighbor of physicists Sheldon Cooper (Jim Parsons) and Leonard Hofstadter (Johnny Galecki), was not in the original pilot.The guys experts on quantum physics, but when it comes to dealing with everyday life on earth, they're lost in the cosmos. The awkward courtship of Leonard and Penny put the relationship in what would evolve into a relationship comedy.Season 4 also brought more gender parity to 'Big Bang': Mayim Bialik, center, and Melissa Rauch, second right, who play the love interests for Sheldon and Wolowitz (Simon Helberg, right), respectively, were promoted to series regulars.In addition to a steadily increasing salary from her day job, Cuoco began to rake in endorsement cash.According to a video posted to Cook's Instagram account Thursday night, Cuoco accidentally put the cart before the horse, shouting "We're engaged! This is the best night of my life and I think the video shows it is the best night for kaley as well....she said yes!!!!!