Let's celebrate with a little 90210 quiz, shall we?
While there's some debate as to whether there were eight or nine original stars on BH 90210, there's no question that some of the actors weren't even close to the age of the characters they played. Suspension of disbelief is a glorious thing, and part of the reason the series did so well.
See how well you know the real names of the original stars from the first season. We put three minutes on the clock... ready, set, go!