Simon Helberg was not the first choice to play Howard on The Big Bang Theory, and he didn't learn that until much later.
Simon Helberg and Melissa Rauch didn't become quite as close as their characters on "The Big Bang Theory," but Helberg did made a big sacrifice for his co-star.
American sitcom The Big Bang Theory centers around friends Leonard Hofstadter (Johnny Galecki), Sheldon Cooper (Jim Parsons), Penny Teller (Kaley Cuoco), Howard Wolowitz (Simon Helberg ...