There are a bunch of actors that me and my friends refuse to call by their real names, and we only use the name for which they are most famous. Examples:
Carl Weathers = Apollo Creed.
Sean Astin = Rudy
Sean William Scott = Stifler
Ed O'Neill = Al Bundy
Charles S. Dutton = Roc
I think this an interesting phenomenon to me. Like, I realize Sean Astin was in Lord of the Rings, but he's Rudy!!! He'll never be anything but Rudy to me. When he was on 24, I couldnt believe his character, because he was just Rudy in my mind.
Anyway, I'll try to think of some more examples of this