“ I dunno, if I had Grace Kelly bringing me dinner I wouldn’t be taking out the binoculars to look at Raymond Burr.”
This has always bothered me. Grace Kelly was the most beautiful Hollywood actress at the time (an arguably ever). And he basically ignores her.
That's the entire subplot going on in the movie. Essentially Grace Kelly is the top super model in NYC who has a thing for older men who are risk takers. She makes considerably more money than Stewart's character. Who is an international photographer who risks life and limb to get photographs in war torn areas around the Globe.
She is trying to get him to settle down. He is not ready to give up his freedom. He is getting a taste of being a "kept man" with a broken leg dependent on his girlfriend and housekeeper while he's on the mend. Grace is pulling out all the stops to show that it can be quite pleasant in the cage he is trying to avoid.
The script is ahead of its time when you consider all the problems women who make a lot of money in today's society face when trying to have a relationship. It was also quite risqué for the time showing a single woman essentially stay over at her boyfriends apartment throwing herself at him. There is also the taboo of a much older man with a 20 something woman.
The script and Hitchcock hide so much social commentary in this film that it adds to the tension of what the main plot is all about. Having seen this a number of times it takes a few viewings before you are desensitized to Grace Kelly's charm and start to see the subtleties of the script.