Penny and leonard are officially engaged yes after years of dating and four rejected proposals between them leonard finally put a ring on it on thursday s the. Sheldon s meemaw paid her beloved moonpie a visit on thursday s big bang theory which found two of the most important women in his life at odds. Penny is a fictional character from the american cbs sitcom the big bang theory portrayed by actress kaley cuoco she is the primary female character in the series befriending her across the hall neighbors leonard hofstadter johnny galecki and sheldon cooper jim parsons two physicists who work at the nearby california institute of technology caltech.