Brother of Kathryn Trosper Popper, who was a 25-year-old personal assistant to Orson Welles when he cast her as a photographer in the closing scene of "Citizen Kane" and fed her the immortal line, "What's Rosebud?." She was 100 at her death in 2016 and believed to be the last surviving actor to have appeared in the film, which was released in 1941.