I know that this feature inspires me to exclaim "This is my favorite movie ever!"often, but this one probably is. I've seen this version, as well as the one with Annette Bening and Warren Beatty (Love Affair), as well as the ones that touch upon it slightly, like Sleepless in Seattle.
It's beautiful, it's dreamy, and it makes you want to come closer to your TV just to soak it all in.
Here's Deborah Kerr in 1957...
and a close-up