1956: Grace Kelly and Prince Rainier III

Grace Kelly and Prince Rainier III were the only couple that the world seemed to care about during 1956. Kelly remains to be the most iconic celebrity turned into royalty in world history, credits to her massive fame and incomparable charm. Unlike most of the marriages in a list of celebrity romances, these two actually had a happy ever after ending that people hoped and dreamed off for them to have.

This is the first and last marriage of the Princess of Monaco, as they never filed for separation. At the age of just 26, the award-winning actress, who was at the peak of her career at the time, was introduced to His Royal Highness and instantly falling in love with one another. Prince Rainier was also at the top of his world with all of his new responsibilities, duties, and obligations. It seemed like the perfect time for him to need a wife.