Actor Prosopagnosia: A Proso-poll-nosia

Fred Gwynne seems hard to mistake for anyone else.

I mistook David Straitharn for Sydney Pollack for a long time.

once Pollack was dead I then realized my mistake

Ok, we've reached a new level. We started watching Hawkeye and in E2 my wife is confused and thinks Kate Bishop's mother is a superhero. After a few more questions, she says, "yeah, isn't she Jane Grey" (not a typo)? At this point, I finally deduce that she has confused Vera Farmiga and Famke Janssen. She keeps me on my toes.