Katie Holmes and Tom Cruise wedding cost a whopping $2 million back in 2006.

Part of the reason being the gown: Katie Holmes walked down the aisle in a Giorgio Armani gown. Another big contributor to the price tag?The location which was the spectacular Odescalchi Castle in Italy.

Among the 150 guests at the Scientology ceremony (which lasted 20 minutes) were Victoria Beckham, Jennifer Lopez and Will Smith.
The guests then dined in the 15^th-century castle’s banqueting suite as Italian tenor Andrea Bocelli serenaded the couple with Italian love songs. The bride apparently wore an exclusive Clive Christian No. 1 perfume, which costs $2,350  an ounce and spent $3,000 on wedding night lingerie.