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

"I thought we had a unique character," Lorre said. "Why wouldn’t you protect it?” The Big Bang Theory creator Chuck Lorre is opening up about why he resisted giving Jim Parsons’ Sheldon a love interest for so long.

Prior to Kaley Cuoco, actress Amanda Walsh was cast to play Katie, “a street-hardened tough-as-nails woman with a vulnerable interior.”