Britain's Princess Beatrice celebrated her 18th birthday with a star-studded banquet on Saturday (07/15/06).

The young royal wore a stunning £10,000 silk gown - flown over from New York fashion house Marchesa as a gift - to the Victorian-themed masked ball held at Windsor Castle.

According to Britain's Daily Mail newspaper, the 500-strong guest list included Hollywood star Demi Moore and her husband Aston Kutcher, fashion designer Tommy Hilfiger, model Elle Macpherson, Jack and Kelly Osbourne and Sir Bob Geldof's daughters Peaches and Pixie.

However, notably absent from the celebrations were most of the senior royals including the Queen, Prince Charles and The Duchess of Cornwall, as well as Beatrice's cousins Prince William and Prince Harry.

Still, the princess refused to let a few absent relatives ruin her night and she looked the belle of the ball, as she was led to the dance floor by her father, Prince Andrew, for the first waltz of the night.

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