13. Brad Pitt and Jennifer Aniston. Kevin Winter / Getty (£605,000)Despite being Hollywood's most famous couple at the time, the cost of Brad and Jen's wedding was relatively tame. Most of the expense went on her dress, flowers - 50,000 of them to be precise - and a fireworks display at the end of the night.They split five years later. 12. Khloe Kardashian and Lamar Odom. Frazer Harrison / Getty (£605,000)This pair planned their wedding in just nine days, marrying within a month of meeting. But their wedding was still pretty extravagant, held in Beverly Hills with Khloe wearing a custom-made Vera Wang gown.She filed for divorce in December last year. 11. Madonna and Guy Ritchie. Chris Jackson / Getty (£908,000)Most of the budget went on Madonna's $80,000 Stella McCartney dress, as well as the booking of an entire Scottish castle for the nuptials. They split eight years later. 10. Christina Aguilera and Jordan Bratman. Michael Buckner / Getty (£1.2 million)The pair hired a private vineyard and a 14-piece orchestra for the ceremony, with Christina in a designer gown and Christian Louboutin heels. The reception went on until 5.00 a.m. They split five years later. 9. Tom Cruise and Katie Holmes. Alberto E. Rodriguez / Getty (£1.8 million)TomKat hired out a 15th century Italian castle for their nuptials and invited serious A-Listers including Will and Jada Smith, David and Victoria Beckham and Jennifer Lopez.Katie wore a custom-designed Giorgio Armani wedding dress and guests were treated to an expensive fireworks display.They split five years later. 8. Liza Minnelli and David Gest. Kevin Winter / Getty (£2.5 million)Probably the most star-studded wedding of all time, Michael Jackson was Best Man and Elizabeth Taylor was Maid of Honour at David and Liza's nuptials.Almost 1,000 guests attended the ceremony which included a 50-piece orchestra and 12 tier wedding cake.The pair split a year later. 7. Chelsea Clinton and Marc Mezvinsky. Andrew H. Walker / Getty (£2.9 million)The actual amount hasn't been officially confirmed, but experts say it'd be in the region of $2-5 million. The happy couple forked out $750,000 for catering, $11,000 for the cake, $250,000 in jewellery, $600,000 for air-conditioned tents and $500,000 in flowers. 6. Justin Timberlake and Jessica Biel. Christopher Polk / Getty (£3.9 million)Justin and Jessica booked an entire Italian hotel for their friends and family and paid to close down the surrounding buildings in a bid to avoid the paparazzi. 5. Wayne and Coleen Rooney. Christopher Furlong / Getty (£5 million)Wayne and Coleen flew their family and friends out to Italy for four days of celebrations which cost over $1.5 million alone, including a party on a $120 million yacht.Coleen spent $300,000 on her dress and $140,000 on trips to New York for fittings. They also spent $660,000 for a performance from Coleen's favourite band, Westlife. 4. Michael Jordan and Yvette Prieto. Isaac Brekken / Getty (£6 million)300 guests watched Michael and Yvette marry, before being entertained by Robin Thicke and Usher.The pair chose a seven-layer, crystal encrusted rum wedding cake, and her designer dress was made with handmade silk lace created especially for her. 3. Kim Kardashian and Kris Humphries. Dimitrios Kambouris / Getty (£6 million)The pair blew $10,000 on invitations, $6,000 on cake, $2 million on flowers, $2.5 million on Kim's diamond head-dress and invited 500 guests.Kim also wore three Vera Wang dresses on the day, which was filmed for a two-part, four-hour reality TV special.Kim ended the marriage 72 days later. 2. Petra Ecclestone and James Stunt. Getty (£12 million)The pair married in a Medieval town in Italy which was closed down for the big day. A castle was hired for the occasion, costing $512,000. Petra wore a Vera Wang dress costing $1.3 million. Guests were treated to $6,000 a bottle champagne, an acrobatic display, $165,000 worth of fireworks as well as performances from Black Eyed Peas and David Guetta, who were paid $2.5 million ant $800,000 respectively. 1. Prince William and Kate Middleton. Getty (£20.6 million)It's estimated that security on the day cost $32 million, with the rest of the money being spent on flowers ($800,000) food ($150,000) and champagne ($60,000).Kate's Welsh gold wedding ring cost a rumoured $11,000.