What Did Kaley Cuoco Say When Asked About Playing Penny Again? The Role Play actress played the role of the free-spirited Penny throughout all 12 seasons of The Big Bang Theory. I

"It was some of the best years of my life, and some of the most fun I've ever had," Cuoco said of her time on the hit sitcom.

Kaley Cuoco has revealed she loves Penny in The Big Bang Theory just as much as fans do. Cuoco, 38, told People in an interview published on Saturday, October 19, that her role in the hit CBS sitcom made a significant impact on her life.