The last surviving cast member of "Citizen Kane" -- via the Hollywood Reporter. If you're going to have one film credit, this is the one, and Trosper did. (She served s Welles's assistant, and played, uncredited, the role of the photographer who says, "What's Rosebud?") She went on to marry Martin Popper, the lawyer who defended Trumbo and Lawson during the Hollywood 10 trials. Popper was prosecuted himself later on the same charges. Thus, this lady personally witnessed the greatest and most infamous moments in Hollywood history. Remarkable.