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11854
Getty ImagesPrince Alfred, Duke of Saxe-Coburg and Gotha, dressed as Bacchus, the Roman god of wine, during amateur theatricals at Buckingham Palace.
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21941

Princess Elizabeth (now Queen Elizabeth II) and Princess Margaret dressed in costume for a performance of "Cinderella" at Windsor Castle.
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31940s
Princess Elizabeth (Queen Elizabeth II) dressed in gown for her role as Lady Christina Sherwood in the play "Old Mother Riding Boots."
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41943
Princess Margaret and Princess Elizabeth (Queen Elizabeth II) during a production of "Aladdin" at Windsor Castle.
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51967
Princess Grace and Prince Rainier of Monaco arriving in masks to a costume ball in Venice, Italy.
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61980s
A photograph of Prince William and Prince Harry dressed in police uniform.
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71983
Princess Diana dressed in a traditional blush pink Klondike outfit while on an official visit to Canada.
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81984
Getty ImagesCrown Princess Victoria of Sweden laughs as her mother, Queen Silvia of Sweden, dresses her in a costume complete with candles.
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91984
Prince Edward dressed up in an elegant suit for the Raj Ball in London.
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101986
Prince Harry and Prince William dressed in army uniforms as toddlers on the steps of Highgrove House.
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111986
Getty ImagesPrince William and Prince Harry play with Princess Diana in their army uniforms at Highgrove House.
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121987
Prince Harry dressed as a red goblin for his nursery school Nativity play.
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131987
Prince Harry dressing in a police uniform during a visit to the police force in Windsor.
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141987
Prince Andrew and Sarah Ferguson in traditional Klondike costumes during a visit to Fort Edmonton, Canada.
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151987
Tim Graham//Getty ImagesThe Duke and Duchess of York show off their Klonlike costumes around Fort Edmonton, Canada.
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161988
Prince Harry dressed in a shepherd costume for a Christmas play at his school.
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171989
Prince Harry dressed in a ruffle suit as a pageboy for his Uncle's wedding.
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181999
Princess Beatrice and Princess Eugenie dressed as ballerinas in purple tutus while arriving with their mother, Sarah Ferguson, for "Santa's Starry Night" show at the Drury Lane Theatre.
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192001
Sweden's Princess Victoria and Princess Madeleine in renaissance gowns at Gripsholm Castle in Sweden.
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202001
Queen Margrethe and husband Henrik in Sweden.

Jennifer Algoo is the Visuals Director at Harper's BAZAAR. She is a graduate of the School of Visual Arts and has previously worked at Patrick McMullan Co. as well as completing internships at Martha Stewart Weddings, Vogue and CosmoGirl! Magazine. Jennifer covers royal, celeb and art content as well as overseeing all visual assets on BAZAAR.com. When she's not obsessing over the royals you can find her attempting to solve cold cases as an armchair detective, traveling and experimenting with new recipes.
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