Here are some of the world's most expensive dresses that can be found out there: Danasha Gown: $1.5 Million. Peacock Wedding Dress: $1.5 Million. William Travilla's Marilyn Monroe dress: $5.6 Million. Yumi Katsura White Gold Dress: $ 8.5 million. The Diamond Wedding Gown: $12 million. Nightingale of Kuala Lumpur: $30 Million.