She was a young, beautiful, talented actress at the peak of her career. Independently wealthy too.
It seems like she barely knew Rainier, they were like penpals.
She got to be a princess, but only a Serene Highness, and Monaco was a tiny principality held in low regard by other Western countries.
She looked utterly wretched on her wedding day - far more than Charlene did. I know what Grace Kelly did for Monaco but don't get what attraction it held for her.