3.Queen Letizia And King Felipe of Spain – 2004
Journalist Letizia Ortiz married King Felipe of Spain in 2004, and it came as a surprise to many. The couple met at a dinner party held by a mutual friend, and they secretly dated for a year before announcing their engagement. Six months later, Letizia walked down the aisle in the most expensive dress worn by a royal.

Letizia’s gown was designed by Manuel Pertegaz, featuring natural silks embroidered gold thread and a 15-foot train. The dress also had a high standing collar, and she wore a simple tiara to compliment the whole thing. The dress cost a whopping $8 million!