There were no satellites, no live coverage outside Western Europe. Film of the civil and religious weddings had to be flown by airplane to networks in North America. Radio had same day coverage, but taped.
I was 22 months old when Grace Kelly married Prince Rainier. My mother was very interested in royalty, so I will assume that I was in my playpen when mom listened to the wedding coverage on the radio.
These images are from my personal collection.