who is penny in big bang
Email. The season 9 premiere of The Big Bang Theory  is a big one. It opens in Vegas with Leonard and Penny getting married, played by longtime Big Bang stars Johnny Galecki and Kaley Cuoco-Sweeting. Showrunner Steve Molaro spoke to the Hollywood Reporter and dished on what to expect. Read: Kaley Cuoco-Sweeting Reveals Diet and Fitness Secrets.