Angela's character plays a mystery writer who's instantly recognized and complimented by fans of her novels. Not only that but she travels frequently and is always staying with friends or accepting visits from friends. 'Lots of smile opportunities there.
The lesson I draw from this is that actors can't be cast according to their natural demeanor, but by what they're able to perform when the footlights are on. Everybody knows this already but it's nice to be reminded of it once in a while.