Rear Window. Perfect casting: James Stewart, Grace Kelly, Raymond Burr, even Thelma Ritter. And the guy who played the piano across the courtyard was Ross Bagdasarian, aka David Seville, creator of the Chipmunks. Hitchcock is shown standing next to his piano in one scene.
The movie is scary as hell with NO gore.
I also love
North by Northwest...and it mentions Ypsilanti.
And yes,
Rebecca is also wonderful....Dame Judith Anderson and George Sanders are always great. And Laurence....what a babe.

Cymru Am Byth!