Idle thought: What's the earliest (good) movie featuring an actor who remains active to this day? I know Clint has a few 50s appearances, but it doesn't sound like any of them are good.
rita moreno was in
singin' in the rain in 1952 and has multiple 2023 acting credits.
sophia loren was in a bunch of solid stuff as early as 1954 and was still active in 2020, nothing since except a doc about herself though.
lois smith was in the classic
east of eden back in 1955, and is still going (she was in
the french dispatch, and something else in 2022).
bruce dern was in the great
wild river in 1960, albeit uncredited.
robert duvall was in
to kill a mockingbird back in 1962, he's still appearing in stuff. robert redford was in the fairly acclaimed
war hunt in the same year.
james earl jones was in
dr strangelove in 1964, which matches the year of eastwood's first 'major' film. ditto michael caine in
zulu (he was in stuff all the way back to 1950 but not sure any of it was good), and maggie smith in
the pumpkin eater. julie andrews was in
mary poppins in 1964 but she's only active as a voice actor now. morgan freeman was an uncredited nobody in 1964's
the pawnbroker. jane fonda was also in solid stuff around the same time.
forgive me if i missed that any of these died recently lmao.
edit: you beat me to a couple of these.