"We did the very clichéd, in the beginning, goofy blonde who says foolish things," Lorre says of the character Penny.

Lorre explained that it took the show a while to understand that the character was more than a "dumb blonde" The Big Bang Theory creator Chuck Lorre is looking back on the evolution of Kaley Cuoco’s character in the beloved sitcom’s early days.

Chuck Lorre knows Penny was "one-dimensional" and "clichéd" in the early days of the hit sitcom, but after several episodes he realized "there was a brilliance" to her.