The Beautiful Girl Penny in Big Bang Theory

Penny is the show's main female protagonist. She lives in apartment 4B across the hall from Leonard Hofstadter and Sheldon Cooper, who live in apartment 4A. Her full first name is possibly "Penelope" as implied by "The Barbarian Sublimation", and her family name has not been given so far.

An aspiring but mostly unsuccessful actress, she was born on a farm near Omaha, Nebraska, and works at The Cheesecake Factory as a waitress. Penny was the original female lead in the show before being joined by Bernadette Rostenkowski and Amy Farrah Fowler.

She has been Leonard's love interest for most of the show, with the two dating briefly in the first episode of the second season, for most of the third season, and they rekindled their romance in "The Recombination Hypothesis". Penny is good friends with Leonard (despite their rocky relationship) and Sheldon, and even though she is considered part of the guys' group, she represents the "average person" for viewer context in the series.