Photo: Dave Benett/Getty; Anwar Hussein/Getty; BAUER-GRIFFIN

01of 13Kate Middleton in 2007Kate Middleton.BAUER-GRIFFINBeforeKate Middletonbecame the Duchess of Cambridge (andnow Princess of Wales), she was just another 20-somethingheading out to celebrate Halloween. She spent the holiday in 2007 attending a party with her younger sister,Pippa Middleton. She wore a black dress paired with a cape, fishnet stockings and boots, making her a spooky character (or, perhaps, a bewitching witch?) for the night out.
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Kate Middleton in 2007
Kate Middleton.BAUER-GRIFFIN

BeforeKate Middletonbecame the Duchess of Cambridge (andnow Princess of Wales), she was just another 20-somethingheading out to celebrate Halloween. She spent the holiday in 2007 attending a party with her younger sister,Pippa Middleton. She wore a black dress paired with a cape, fishnet stockings and boots, making her a spooky character (or, perhaps, a bewitching witch?) for the night out.
02of 13Prince Harry in 2003Prince Harry.KIRSTY WIGGLESWORTH/AFP via GettyIn 2003,Prince Harryplayed dress up for an Eton College production ofMuch Ado About Nothing.
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Prince Harry in 2003
Prince Harry.KIRSTY WIGGLESWORTH/AFP via Getty

In 2003,Prince Harryplayed dress up for an Eton College production ofMuch Ado About Nothing.
03of 13Princess Beatrice in 2018Dave Benett/GettyQueen Elizabeth’s granddaughter sported a purple wig and whimsical unicorn horn in 2018 for aHalloweencostume party at Annabel’s in London.
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Princess Beatrice in 2018
Dave Benett/Getty

Queen Elizabeth’s granddaughter sported a purple wig and whimsical unicorn horn in 2018 for aHalloweencostume party at Annabel’s in London.
04of 13Queen Elizabeth and Princess Margaret in the 1940sQueen Elizabeth and Princess Margaret.Toronto Star Archives/Toronto Star via Getty ImagesQueen Elizabeth, then Princess Elizabeth, and her sister put on their fancy dress for World War II-era Christmas plays at Windsor Castle. The series of pantomimes from 1941 through 1944 raised money for the Royal Household Wool Fund, which supplied knitting wool to make comforters for soldiers.
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Queen Elizabeth and Princess Margaret in the 1940s
Queen Elizabeth and Princess Margaret.Toronto Star Archives/Toronto Star via Getty Images

Queen Elizabeth, then Princess Elizabeth, and her sister put on their fancy dress for World War II-era Christmas plays at Windsor Castle. The series of pantomimes from 1941 through 1944 raised money for the Royal Household Wool Fund, which supplied knitting wool to make comforters for soldiers.
05of 13Prince Charles and Princess Diana in 1983Anwar Hussein/GettyKing Charles III (known then asPrince Charles) andPrincess Dianasported traditional Klondike outfits to attend a Klondike evening barbeque during a 1983 visit to Canada.
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Prince Charles and Princess Diana in 1983
Anwar Hussein/Getty

King Charles III (known then asPrince Charles) andPrincess Dianasported traditional Klondike outfits to attend a Klondike evening barbeque during a 1983 visit to Canada.
06of 13Prince Andrew and Sarah Ferguson in 1987Prince Andrew & Sarah Ferguson.Georges De Keerle/GettyPrince AndrewandSarah “Fergie” Fergusonalso got dressed up during a visit to Canada in 1987.
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Prince Andrew and Sarah Ferguson in 1987
Prince Andrew & Sarah Ferguson.Georges De Keerle/Getty

Prince AndrewandSarah “Fergie” Fergusonalso got dressed up during a visit to Canada in 1987.
07of 13Prince William in 1987Prince William.Tim Graham Photo Library via GettyA youngPrince Williamrocked a mask that he made at school.
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Prince William in 1987
Prince William.Tim Graham Photo Library via Getty

A youngPrince Williamrocked a mask that he made at school.
08of 13Princess Beatrice in 2016Princess Beatrice.Eamonn M. McCormack/GettyPrincess Beatricestepped out with a fanciful cat mask and white wig for the annual UNICEF U.K. Halloween Ball in 2016.
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Princess Beatrice in 2016
Princess Beatrice.Eamonn M. McCormack/Getty

Princess Beatricestepped out with a fanciful cat mask and white wig for the annual UNICEF U.K. Halloween Ball in 2016.
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Prince Harry in 1987
Prince Harry.Tim Graham Photo Library via Getty

10of 13Princess Madeleine of Sweden and family in 2020Princess Madeleine of Sweden and her kids.Princess Madeleine of Sweden/InstagramPrincess Madeleineof Sweden and her family had fun in their costumes. The royal mom went as a classic black cat, while Princess Adrienne made an adorablepumpkinon her first Halloween. Prince Nicolas dressed up as Batman, complete with a cape and black mask painted around his eyes, and Princess Leonore was all smiles as a colorful mermaid.
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Princess Madeleine of Sweden and family in 2020
Princess Madeleine of Sweden and her kids.Princess Madeleine of Sweden/Instagram

Princess Madeleineof Sweden and her family had fun in their costumes. The royal mom went as a classic black cat, while Princess Adrienne made an adorablepumpkinon her first Halloween. Prince Nicolas dressed up as Batman, complete with a cape and black mask painted around his eyes, and Princess Leonore was all smiles as a colorful mermaid.
11of 13Camille Gottlieb in 2016Camille Gottlieb.Camille Gottlieb/InstagramGrace Kelly’s granddaughter went the spooky route in 2016, dressing up as Jigsaw from theSawmovies. “Let play a game,” she captioned her photo on Instagram.
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Camille Gottlieb in 2016
Camille Gottlieb.Camille Gottlieb/Instagram

Grace Kelly’s granddaughter went the spooky route in 2016, dressing up as Jigsaw from theSawmovies. “Let play a game,” she captioned her photo on Instagram.
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Princess Leonore of Sweden in 2015
Princess Leonore.Princess Madeleine of Sweden/Facebook

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Prince Harry and Meghan Markle in 2018
Prince Harry and Meghan Markle.Dominic Lipinski - Pool/Getty

source: people.com