Prince William and Kate Middleton
Total Estimated Cost: $33 million
Number of Guests: 1,900
Details: The royal wedding broke records for the biggest ever live-streaming audience online, and for good reason. In addition to $800,000 worth of flowers, the April 29, 2011 event boasted an $80,000, eight-tier wedding cake with over 900 flowers. In addition to the world leaders and the British royal family, guests included David and Victoria Beckham, Elton John and Guy Ritchie. The royal couple will welcome their first child later this year. —XFINITY Entertainment Staff (Chris Jackson/Getty Images)
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