Simon Helberg as Howard Wolowitz – Now:
Simon is another of the original cast members who has been with "The Big Bang Theory" since day one when he was introduced as the nerdy mama's boy still caught under his overbearing mother's thumb. Recently, Simon has also managed to fit in several film appearances in addition to his work on "The Big Bang Theory," including a role as the pianist Cosme McMoon in "Florence Foster Jenkins," which also starred Meryl Streep and Hugh Grant.