Mayim Bialik's acting career has spanned decades. In a throwback photo from the late '80s and her child acting days, she looks totally unrecognizable.

In PEOPLE's exclusive first look at the trailer for 'And They’re Jewish', Debra Messing, Mayim Bialik and more stars ...

The Big Bang Theory shines because of the chemistry of its ensemble cast, but they're also talented actors on their own. After playing their iconic Big Bang Theory characters for over a decade, it’s ...