Image Credit: Spelling Television/Everett CollectionIf you’re under 25, that headline probably means nothing to you. If you’re over, you may have just broken into a cold sweat. But before you reach for the booze, keep this in mind: Carteris was 29 when she started playing 16-year old Andrea Zuckerman on Beverly Hills, 90210 in 1990. Her youngest costar, Brian Austin Green (a.k.a. David Silver) won’t hit the big five-0 until … 2023! Phew. That’s way in the future. And Shenae Grimes, star of the new 90210, won’t be 50 until 2039! Which, whoops, just made us feel old again. So forget that part. Happy birthday, GC!