You first knew actor/actress from a role different from one they're widely known in.

[terentii]

@Jim_s_Son

Closer to 22

Kim Cattrall - IMDb

I stand corrected. She sure looked like a teenager, as I recall.

[handsomeharry]

@CalMeacham

No, to me, he was always Carter Nash, alter ego to spoof superhero Captain Nice in the pretty much forgotten 1967 sitcom Captain Nice from the folks who gave us Get Smart!

This.