<P> It is possible that Leonard is based on the show 's co-creator , Bill Prady , back when he was a computer programmer . Leonard has been described as the straight man of the series . Penny ( Kaley Cuoco ) is Leonard 's next - door neighbor and main love interest , and the teasing of romance between the two of them is a major force driving the series . In `` The Gorilla Dissolution '' , they finally become engaged , marrying in Las Vegas at the beginning of season 9 . </P>
<P> It is possible that Leonard is based on the show 's co-creator , Bill Prady , back when he was a computer programmer . Leonard has been described as the straight man of the series . Penny ( Kaley Cuoco ) is Leonard 's next - door neighbor and main love interest , and the teasing of romance between the two of them is a major force driving the series . In `` The Gorilla Dissolution '' , they finally become engaged , marrying in Las Vegas at the beginning of season 9 . </P>
who does leonard marry in big bang theory
who does leonard marry in big bang theory
Penny
Penny