Related: The Big Bang Theory: Every Holiday Episode, Ranked According To IMDb
The character was also meant to be portrayed by Amanda Walsh and not Kaley Cuoco. However, test audiences reacted badly to the initial pilot, forcing CBS to switch up the character completely and gave her a 'dumb blonde' personality for comedic purposes. It turned out to be a good move. Secret facts aside, here are a couple of details about Penny that audiences missed in the sitcom.