You can now buy a slice of Prince William and Kate Middleton's wedding cake

If you were one of the billions of people who tuned in to watch Kate Middleton and Prince William get married, you know just how lavish the celebration was. The royal wedding was something out of a storybook, and even though it took place six years ago, there's still an opportunity for you to relive that special day.

The couple are auctioning off a slice of their wedding cake to raise money for charity. The auction will take place at Chiswick Auctions auction house on September 27, and the lucky winner will take home a slice of fruitcake that was part of an eight-tier work of art designed by cake maker Fiona Cairns.

Inside the Royal Wedding:

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The Royal Wedding: Prince William marries Kate Middleton
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The Royal Wedding: Prince William marries Kate Middleton
ATTENTION EDITORS - EMBARGO, RELEASABLE TUESDAY 29 MARCH AT 0001 GMT - THIS RESTRICTION APPLIES TO ALL MEDIA, INCLUDING WEBSITES Royal Demi Chef De Partie, Shaun Mason (L) and Royal Chef Mark Flanagan, Head of Kitchens at Buckingham Palace, work in the kitchens at Buckingham Palace, London on March 25, 2011, as preparations for the forthcoming wedding of Prince William and Kate Middleton are underway. The second-in-line to the throne marries his university sweetheart on April 29 at Westminster Abbey, in an event that has become a global media sensation ever since they announced their engagement last November. AFP PHOTO/WPA POOL/Nick Ansell (Photo credit should read Nick Ansell/AFP/Getty Images)
ATTENTION EDITORS - EMBARGO, RELEASABLE TUESDAY 29 MARCH AT 0001 GMT - THIS RESTRICTION APPLIES TO ALL MEDIA, INCLUDING WEBSITES Jennifer Scott, Assistant Curator of Paintings, looks up at her favourite painting as she walks past a Canaletto, Venice towards Santa Maria Della Salute (1723), in the Picture Gallery at Buckingham Palace, London, which will be one of the rooms used during the wedding reception of Prince William and Kate Middleton London on March 25, 2011. The second-in-line to the throne marries his university sweetheart on April 29 at Westminster Abbey, in an event that has become a global media sensation ever since they announced their engagement last November.AFP PHOTO/WPA POOL/Nick Ansell (Photo credit should read Nick Ansell/AFP/Getty Images)
ATTENTION EDITORS - EMBARGO, RELEASABLE TUESDAY 29 MARCH AT 0001 GMT - THIS RESTRICTION APPLIES TO ALL MEDIA, INCLUDING WEBSITES A chef of the Royal Household at Buckingham Palace, London, holds a tray of canapes akin to that which is usually served at receptions held at the palace, in the kitchens at Buckingham Palace, London on March 25, 2011, as preparetions for the forthcoming wedding of Prince William and Kate Middleton are underway. The second-in-line to the throne marries his university sweetheart on April 29 at Westminster Abbey, in an event that has become a global media sensation ever since they announced their engagement last November. AFP PHOTO/WPA POOL/Nick Ansell (Photo credit should read Nick Ansell/AFP/Getty Images)
UK - Wedding of Prince William & Kate Middleton - Buckingham Palace (Photo by Stephane Cardinale/Corbis via Getty Images)
(FILE PHOTO) In this composite image a comparison has been made between the Royal Wedding Cathedral aisle walks of Prince Charles, Prince of Wales and Lady Diana Spencer with that of Prince William and Catherine, Duchess of Cambridge.(Left Image) LONDON, UNITED KINGDOM - JULY 29: The Wedding Of Prince Charles To Lady Diana Spencer Held At St Paul's Cathedral In London. A General View Of The Prince And Princess Of Wales Walking Arm-in-arm Down The Aisle With Their Bridesmaids And Pageboys. (Photo by Tim Graham/Getty Images)(Right image) LONDON, ENGLAND - APRIL 29: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge leave Westminster Abbey following their marriage ceremony, on April 29, 2011 in London, England. The marriage of Prince William, the second in line to the British throne, to Catherine Middleton is being held in London today. The marriage of the second in line to the British throne is to be led by the Archbishop of Canterbury and will be attended by 1900 guests, including foreign Royal family members and heads of state. Thousands of well-wishers from around the world have also flocked to London to witness the spectacle and pageantry of the Royal Wedding. (Photo by Dave Thompson- WPA Pool/Getty Images)
FLECKNEY, UNITED KINGDOM - MARCH 24: Cake designer Fiona Cairns, who has been commissioned by Prince William and Kate Middleton to create a multi-tiered traditional fruit cake for their wedding, holds a tray of decorations for the cake March 24, 2011 in Fleckney, Leicestershire, England. The wedding will take place on April 29, 2011. (Photo by Rui Vieira - WPA Pool/Getty Images)
LONDON, ENGLAND - APRIL 28: Catherine Middleton arrives at The Goring Hotel after visiting Westminster Abbey on April 28, 2011 in London, England. With less than 24 hours to go final preparations for the wedding of Prince William and Catherine Middleton are in place. (Photo by Christopher Furlong/Getty Images)
ROME, ITALY - APRIL 28: The British Embassy in Rome presents a book of signatures to celebrate the royal wedding of Prince William and Kate Middleton on April 28, 2011 in Rome, Italy. The wedding of Britain's Prince William and his fiancee Kate Middleton will be celebrated at Westminster Abbey in London on April 29, 2011. (Photo by Giorgio Cosulich/Getty Images)
LONDON, ENGLAND - APRIL 29: Guests arrive at Westminster Abbey ahead of the Royal Wedding of Prince William to Catherine Middleton at Westminster Abbey on April 29, 2011 in London, England. The marriage of the second in line to the British throne is to be led by the Archbishop of Canterbury and will be attended by 1900 guests, including foreign Royal family members and heads of state. Thousands of well-wishers from around the world have also flocked to London to witness the spectacle and pageantry of the Royal Wedding. (Photo by Dominic Lipinski - WPA Pool/Getty Images)
LONDON, ENGLAND - APRIL 29: Servicemen in Full Dress arrive to attend the Royal Wedding of Prince William to Catherine Middleton at Westminster Abbey on April 29, 2011 in London, England. The marriage of the second in line to the British throne is to be led by the Archbishop of Canterbury and will be attended by 1900 guests, including foreign Royal family members and heads of state. Thousands of well-wishers from around the world have also flocked to London to witness the spectacle and pageantry of the Royal Wedding. (Photo by Dan Kitwood/Getty Images)
LONDON, ENGLAND - APRIL 29: Crowds pose for a portrait during the Royal Wedding of Prince William to Catherine Middleton on April 29, 2011 in London, England. The marriage of the second in line to the British throne was led by the Archbishop of Canterbury and was attended by 1900 guests, including foreign Royal family members and heads of state. Thousands of well-wishers from around the world have also flocked to London to witness the spectacle and pageantry of the Royal Wedding. (Photo by Dave Hogan/GP) (Photo by Dave Hogan/GP/Getty Images)
LONDON, ENGLAND - APRIL 29: (Centre) David Beckham and Victoria Beckham arrive to attend the Royal Wedding of Prince William to Catherine Middleton on April 29, 2011 in London, England. The marriage of the second in line to the British throne was led by the Archbishop of Canterbury and was attended by 1900 guests, including foreign Royal family members and heads of state. Thousands of well-wishers from around the world have also flocked to London to witness the spectacle and pageantry of the Royal Wedding. (Photo by Georges De Keerle/GP/Getty Images)
LONDON, ENGLAND - APRIL 29: Guests arrive to attend the Royal Wedding of Prince William to Catherine Middleton on April 29, 2011 in London, England. The marriage of the second in line to the British throne was led by the Archbishop of Canterbury and was attended by 1900 guests, including foreign Royal family members and heads of state. Thousands of well-wishers from around the world have also flocked to London to witness the spectacle and pageantry of the Royal Wedding. (Photo by Georges De Keerle/GP/Getty Images)
Queen Sofia of Spain departs Claridge's hotel to attend the wedding of Prince William and Miss Catherine Middleton on April 29, 2011 in London, England.
A military marching band perform as they march along the processional route on the day of the wedding of Britain's Prince William and Kate Middleton, on April 29, 2011, in central London. AFP PHOTO / PIERRE-PHILIPPE MARCOU (Photo credit should read PIERRE-PHILIPPE MARCOU/AFP/Getty Images)
LONDON, ENGLAND - APRIL 29: Tara Palmer-Tomkinson arrives to attend the Royal Wedding of Prince William to Catherine Middleton at Westminster Abbey on April 29, 2011 in London, England. The marriage of the second in line to the British throne is to be led by the Archbishop of Canterbury and will be attended by 1900 guests, including foreign Royal family members and heads of state. Thousands of well-wishers from around the world have also flocked to London to witness the spectacle and pageantry of the Royal Wedding. (Photo by Mike Marsland/WireImage)
LONDON, ENGLAND - APRIL 29: Crowds pose for a portrait during the Royal Wedding of Prince William to Catherine Middleton on April 29, 2011 in London, England. The marriage of the second in line to the British throne was led by the Archbishop of Canterbury and was attended by 1900 guests, including foreign Royal family members and heads of state. Thousands of well-wishers from around the world have also flocked to London to witness the spectacle and pageantry of the Royal Wedding. (Photo by Dave Hogan/GP) (Photo by Dave Hogan/GP/Getty Images)
A military division march in front of Westminster Abbey in London on the day of the wedding of Britain's Prince William and Kate Middleton, on April 29, 2011. AFP PHOTO / ODD ANDERSEN (Photo credit should read ODD ANDERSEN/AFP/Getty Images)
LONDON, ENGLAND - APRIL 29: Prince William and Catherine Middleton at the altar during their wedding service in Westminster Abbey on April 29, 2011 in London, England. The marriage of the second in line to the British throne is being led by the Archbishop of Canterbury and will be attended by 1900 guests, including foreign Royal family members and heads of state. Thousands of well-wishers from around the world have also flocked to London to witness the spectacle and pageantry of the Royal Wedding. (Photo by Anthony Devlin - WPA Pool/Getty Images)
LONDON, ENGLAND - APRIL 29: Catherine Middleton waves to the crowds as she arrives to attend her Royal Wedding to Prince William on April 29, 2011 in London, England. The marriage of the second in line to the British throne was led by the Archbishop of Canterbury and was attended by 1900 guests, including foreign Royal family members and heads of state. Thousands of well-wishers from around the world have also flocked to London to witness the spectacle and pageantry of the Royal Wedding. (Photo by Georges De Keerle/GP/Getty Images)
LONDON, ENGLAND - APRIL 29: Prince William sings beside his bride Catherine Middleton during their wedding at Westminster Abbey on April 29, 2011 in London, England. The marriage of Prince William, the second in line to the British throne, to Catherine Middleton is being held in London today. The marriage of the second in line to the British throne is to be led by the Archbishop of Canterbury and will be attended by 1900 guests, including foreign Royal family members and heads of state. Thousands of well-wishers from around the world have also flocked to London to witness the spectacle and pageantry of the Royal Wedding. (Photo by Andrew Milligan - WPA Pool/Getty Images)
LONDON, ENGLAND - APRIL 29: Prince William and his new bride Catherine Middleton stand in front of the altar during the service on April 29, 2011 in London, England. The marriage of Prince William, the second in line to the British throne, to Catherine Middleton is being held in London today. The marriage of the second in line to the British throne is to be led by the Archbishop of Canterbury and will be attended by 1900 guests, including foreign Royal family members and heads of state. Thousands of well-wishers from around the world have also flocked to London to witness the spectacle and pageantry of the Royal Wedding. (Photo by Dominic Lipinski - WPA Pool/Getty Images)
LONDON, ENGLAND - APRIL 29: Prince William, Duke of Cambridge and his new bride Catherine, Duchess of Cambridge walk down the aisle at the close of their wedding ceremony at Westminster Abbey on April 29, 2011 in London, England. The marriage of Prince William, the second in line to the British throne, to Catherine Middleton is being held in London today. The Archbishop of Canterbury conducted the service which was attended by 1900 guests, including foreign Royal family members and heads of state. Thousands of well-wishers from around the world have also flocked to London to witness the spectacle and pageantry of the Royal Wedding and street parties are being held throughout the UK. (Photo by Richard Pohle-WPA Pool/Getty Images)
LONDON, ENGLAND - APRIL 29: (L-R) Michael Middleton, Carole Middleton, Prince Charles, The Prince of Wales with Camilla, Duchess of Cornwall and Eliza Lopes, Lady Louise Windsor, Grace van Cutsem, Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge and Margarita Armstrong-Jones, page boys Tom Pettifer and William Lowther-Pinkerton with Queen Elizabeth II, Prince Philip, the Duke of Edinburgh, Pippa Middleton, Prince Harry and James Middleton greet well-wishers from the balcony at Buckingham Palace on April 29, 2011 in London, England. The marriage of the second in line to the British throne was led by the Archbishop of Canterbury and was attended by 1900 guests, including foreign Royal family members and heads of state. Thousands of well-wishers from around the world have also flocked to London to witness the spectacle and pageantry of the Royal Wedding. (Photo by Peter Macdiarmid/Getty Images)
Prince William and his wife Kate Middleton, Duchess of Cambridge, kiss on the balcony of Buckingham Palace in London, following their wedding on April 29, 2011. AFP PHOTO / WPA POOL / JOHN STILLWELL (Photo credit should read JOHN STILLWELL/AFP/Getty Images)
LONDON, ENGLAND - APRIL 29: Catherine Middleton and her father Michael Middleton arrive to attend the Royal Wedding of Prince William to Catherine Middleton at Westminster Abbey on April 29, 2011 in London, England. The marriage of the second in line to the British throne is to be led by the Archbishop of Canterbury and will be attended by 1900 guests, including foreign Royal family members and heads of state. Thousands of well-wishers from around the world have also flocked to London to witness the spectacle and pageantry of the Royal Wedding. (Photo by Warren Little/Getty Images)
Kate Middleton, accompanied by her father Michael Middleton arrives at the West Door of Westminster Abbey in London for her wedding to Britain's Prince William, on April 29, 2011. AFP PHOTO / BEN STANSALL (Photo credit should read BEN STANSALL/AFP/Getty Images)
Britain's Prince Charles travels to Westminster Abbey in London for the wedding of Britain's Prince William and Kate Middleton, on April 29, 2011. AFP PHOTO / MARTIN BUREAU (Photo credit should read MARTIN BUREAU/AFP/Getty Images)
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge depart after their Wedding at Westminster Abbey on April 29, 2011 in London, England.
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge greet wellwishers from the balcony next to (L-R) Lady Louise Windsor, Grace Van Cutsem at Buckingham Palace on April 29, 2011 in London, England. (Photo by George Pimentel/WireImage)
Sister of the Bride and Maid of Honour Pippa Middleton depart the Royal Wedding of Prince William to Catherine Middleton at Westminster Abbey on April 29, 2011 in London, England. The marriage of the second in line to the British throne is to be led by the Archbishop of Canterbury and will be attended by 1900 guests, including foreign Royal family members and heads of state. Thousands of well-wishers from around the world have also flocked to London to witness the spectacle and pageantry of the Royal Wedding. (Photo by Ferdaus Shamim/WireImage)
(L-R) Michael Middleton, Carole Middleton, Eliza Lopes, Prince Charles, Prince of Wales, Camilla, Duchess of Cornwall and Lady Louise Windsor stand on balcony of Buckingham Palace following the wedding of TRH Prince William, Duke of Cambridge and Catherine, Duchesss of Cambridge on April 29, 2011 in London, England. (Photo by George Pimentel/WireImage)
Kate Middleton, left, arrives for her wedding with Britain's Prince William as her maid of honor Pippa Middleton holds the train at Westminster Abbey in London. (Photo by Brooks Kraft LLC/Corbis via Getty Images)
UK - Royal Wedding of Prince William and Kate (Catherine) Middleton - Kate Middleton waves to the crowd along the Mall for the trip to Westminster Abbey 29th April 2011 London UK (Photo by Paul Cunningham/Corbis via Getty Images)
UK - Royal Wedding of Prince William and Kate (Catherine) Middleton - return along the Mall in an open Landau to Buckingham Palace 29th April 2011 London UK (Photo by Paul Cunningham/Corbis via Getty Images)
Britain's Prince William and his wife Catherine, Duchess of Cambridge, leave after their wedding in Westminster Abbey in the 1902 State Landau along the Procession Route, in central London. (Photo by Brooks Kraft LLC/Corbis via Getty Images)
Princess Anne arrives at Westminster Abbey for the wedding ceremony of Britain's Prince William and his wife Catherine, Duchess of Cambridge, in central London. (Photo by Brooks Kraft LLC/Corbis via Getty Images)
Camilla, Duchess of Cornwall, departs Westminster Abbey after the service at the Royal Wedding in London. (Photo by Brooks Kraft LLC/Corbis via Getty Images)
HRH Prince William and Princess Catherine in the procession after their Royal wedding at Westminster Abbey . (Photo by rune hellestad/Corbis via Getty Images)
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According to Chiswick, the slice of cake will come with a printed card that reads "With best wishes from TRH The Prince of Wales and The Duchess of Cornwall in celebration of the wedding of TRH The Duke and Duchess of Cambridge."

While a slice of six-year-old cake might not sound that appetizing, you'd be purchasing a part of history. But make sure to take your checkbook, obviously, as the bidding price is expected to start at £800 (about $1,000).

A slice of Royal History. A piece of fruit cake from the The Duke and Duchess of Cambridge’s wedding, which took place at Westminster Abbey in 2011 and was watched by more than two billion across the globe, is offered in the forthcoming Printed Books and Manuscripts auction on 27 September. • Originally given to guests as a special souvenir, this iconic component of the Royal wedding was an eight-tier bespoke creation crafted by cake-maker Fiona Cairns that took five weeks to complete. This culinary masterpiece was the centrepiece at the reception, which took place in the picture gallery at Buckingham Palace. • It is said that The Duchess of Cambridge requested the Joseph Lambeth technique used for cake decoration. This lavish concept was born in The Lambeth Method published in 1934 and remains one of the most admired and skilled techniques used. The sophisticated technique is based on the English tradition of ‘overpiping’, which creates three-dimensional rows of intricately piped leaves, flowers and garlands. • The Duchess of Cambridge also wanted the cake to reflect the ‘language of flowers’, which consists of 17 different types of foliage that each hold a particular meaning. It is reported that Fiona Cairns took her inspiration from the architectural features in the room such as the garlands on the walls, which were recreated on the fourth tier of the cake. The elaborate cake was covered in cream icing and adorned with 900 exquisite sugar-paste flowers, including roses and apple blossom. • The slice of cake is displayed within its specially commissioned cream and gilt commemorative tin, designed by Peter Windett and Sally Mangum. Read the full story at Chiswickauctions.co.uk. Link in bio. • #royals #royalfamily #princewilliam #duchessofcambridge #williamandkate #katemiddleton #wedding #cake #auction #josephlambethpiping

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Related: Prince Will and Kate's cutest moments

21 PHOTOS
William and Kate's cutest moments ever
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William and Kate's cutest moments ever
When they became husband and wife!
When they presented Prince George to the world.
When William's team won the Foundation Polo Challenge, Kate gave him a kiss on the cheek.

At the premiere of 'African Cats,' when William held the umbrella for Kate.

When Wills helped Kate with her sweatshirt.
The day after their wedding, when they held hands as they jetted off to their honeymoon.
When William helped Kate into her seat during the Olympics. Hey, wedges are treacherous!
When they celebrated a big win for the UK!
When Prince William read Kate's nametag as she rested her hand on his knee.
When doting Prince William led his wife from the hospital, just after they announced she was pregnant.
When they had this adorable moment with George.
When William presented Kate with a flower in Australia.
When William felt the need to help Kate with her handprint-making.
How William always looks back and waits for Kate to catch up.
This impromptu hug when William beat Kate in a boat race.
When they had fun (and were clearly overheated!) during the 2014 Glasgow Commonwealth Games.
When they couldn't stop laughing during an engagement at Prince Edward island, Canada.
When Kate and William led the family to church on Christmas morning, holding hands.
When Kate beat William in a boat race. (They race a lot of boats!)
When they showed us that they have the most PERFECT FAMILY EVER.
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