Penny is a fictional character on the American CBS sitcom The Big Bang Theory, portrayed by actress Kaley Cuoco. She is the primary female character in the
Penny Hofstadter is the series' first and always main female protagonist. She lives in Apartment 4A with her husband Leonard Hofstadter across the hall from Sheldon Cooper, and Amy Farrah Fowler, who live in apartment 4B where Penny used to live. Penny moves into Apartment 4B.
Leonard and Penny's relationship has been a major subject in the series since the beginning of season one pilot episode. Most of the season finales involve Leonard's relationship with Penny in some way. Throughout the season, Penny eventually came around to Leonard's feelings.