Most Expensive Wedding Though a billionaire Indian steel baron threw a $60 million wedding for his daughter in 2004, factor in inflation and the most expensive wedding was a seven-day affair for Sheikh Mohammed bin Rashid Al Maktoum, ruler of Dubai, and his bride, Princess Salama. The 1981 wedding, which would cost $100 million today, included a stadium big enough for 20,000 wedding guests built especially for the celebration.