The original black and white version of The Invasion of The Body Snatchers - 1950s.

Most of the movies I watch are from the 40s-50s and in b&w, film noir and scifi/monster movies. Most recently I watched Plan 9 from Outer Space and Earth vs. The Flying Saucers for the umpteenth times.

Mostly 30's and earlier here, 3 Stooges, Chaplin, and Keaton namely.

Not a movie but I saw a couple of the b&w episodes of bewitched recently

Houseboat - Cary Grant, Sophia Loren

Have watched Modern Times several ....times on Hulu.

Tons of free film noir on YouTube.

Of course any movie made in the '40s or '50s would be considered old. Recently I watched "North By Northwest", "Skyscraper Souls", and "The Man Who Came To Dinner".

I started watching Peyton Place when it came on tv but someone turned the channel.

I love most Doris Day films

I watched The Heiress again, a few weeks ago.

Marry Poppins I think is the oldest most recent I’ve seen

Twelve O'Clock High

high noon

"To Catch a Thief" with Cary Grant and Grace Kelly

None.

2 weeks ago I watched 'Shall we Dance' 1937 , Fred Astair and Ginger Rogers.
....So that almost counts.

And Soylent Green, the iconic 1973 sci-fi of a broken future with Charlton Heston.
It was not bad for such an old movie ...would be a good one to remake .

The last one I can remember is "The Blob"

Saw a noir movie on AMC the other day with Cliff Robertson…forget the name.

I watched the 1958 movie “The Brothers Karamazov” for the very first time, last week. I made a post about it.

https://similarworlds.com/movies/3993360-The-Brothers-Karamazov-1958