In the 1950s, “It Girl” Grace Kelly was on her way to becoming a part of Hollywood royalty. After winning the Oscar for her role in The Country Girl (1954), she threw it all away and traded in her trophy for a tiara. Just like that, she went from actress to princess – the bride of Prince Rainier III of Monaco. You would think that becoming a princess is every girl’s dream, right?

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Well, the actress paid the price of becoming a royal. No, I mean literally. According to a fairly recent documentary, Grace Kelly: The Missing Millions, the 26-year-old actress had to pay a $2 million dowry (which would be roughly $20 million today) to the House of Grimaldi in order to marry her prince.