Designers behind Princess Diana's iconic wedding gown reveal concerning fact

Princess Diana's wedding dress is probably one of the most iconic bridal gowns to date.

For her wedding to Prince Charles, the 20-year-old sported an Emanuel dress with a pearled bodice, frilled sleeves and long veil. Pictures reveal a gorgeous, glamorous wedding gown only fit for a royal -- but the story behind her dress is something much darker. 

According to multiple reports, Diana had lost so much weight before her wedding that she had to be sewn into her gown. And we're not talking about just "a few" centimeters. One of the designers behind the dress, Elizabeth Emanuel, predicted that the princess-to-be lost almost 6 inches around her waist before the royal nuptials.  

See more of the royal wedding: 

22 PHOTOS
Princess Diana's Wedding
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Princess Diana's Wedding
The Prince and Princess of Wales kiss on the balcony of Buckingham Palace after their wedding. (PA Archive)
Prince Charles, Prince of Wales and Diana, Princess of Wales leave St. Pauls Cathedral in London following their wedding on July 29, 1981. (Anwar Hussein)
Lady Diana Spencer and Prince Charles leaving St. Paul's Cathedral after their wedding rehearsal. (PA Archive)
The adorable bridal attendants group on the steps of St.Paul's Cathedral before the wedding ceremony of the Prince of Wales to Lady Diana Spencer. (PA Archive)
The Prince and Princess of Wales at the High Altar in front of the Archbishop of Canterbury, Robert Runcie, during their wedding at St. Paul's Cathedral. Look at that train! (PA Archive)
The Prince and Princess of Wales pose for a wedding portrait in Buckingham Palace after their marriage ceremony at St. Paul's Cathedral. The Princess is wearing the Spencer family tiara. (PA Archive)
The Royal couple, the Prince and Princess of Wales with their young attendants. Sitting, left to right, Catherine Cameron and Clementine Hambro. Standing, left to right, Lord Nicholas Windsor, Edward Van Cutsem, Sarah Jane Gaselee (in front of India Hicks), Prince Edward, the Prince and Princess of Wales, Prince Andrew and Lady Sarah Armstrong-Jones. (PA Archive)
The Prince and Princess of Wales on the balcony of Buckingham Palace after their wedding. (PA Archive)
The Prince and Princess of Wales in an open carriage, waiting to drive to Buckingham Palace after their wedding. (PA Archive)
The relaxed Prince and Princess of Wales on their second wedding anniversary, July 29, 1983. (AP)
TODAY -- Royal Wedding -- Aired 7/29/81 -- Pictured: Lady Diana Spencer look a-like modeling a wedding dress similar to that actually worn at the Royal Wedding -- Photo by: NBCU Photo Bank
LONDON, UNITED KINGDOM - JULY 29: Diana, Princess of Wales, wearing an Emanuel wedding dress, enters St. Paul's Cathedral on the hand of her father, Earl Spencer, for her marriage to Prince Charles, Prince of Wales on 29 July, 1981 in London, England. (Photo by Anwar Hussein/Getty Images)
29th July 1981: Formal portrait of Lady Diana Spencer (1961 - 1997) in her wedding dress designed by David and Elizabeth Emanuel. (Photo by Fox Photos/Getty Images)
LONDON - JULY 29: Diana, Princess of Wales and Prince Charles ride in a carriage after their wedding at St. Paul's Cathedral July 29, 1981 in London. Diana told of a lonely existence in her married life to Prince Charles in audio tapes aired by the U.S. television network NBC on March 4, 2004. (Photo by Anwar Hussein/Getty Images)
29th July 1981: Charles, Prince of Wales, with his wife, Princess Diana (1961 - 1997), on the altar of St Paul's Cathedral during their marriage ceremony. (Photo by Hulton Archive/Getty Images)
LONDON - JULY 29: (FILE PHOTO) Prince Charles, Prince of Wales and Diana, Princess of Wales leave St. Paul's Cathedral following their wedding July 29, 1981 in London, England. (Photo by Anwar Hussein/Getty Images)
Lady Diana, Princess of Wales and Charles, Prince of Wales are seen during their wedding at St Paul Cathedral in London 29 July 1981. (Photo credit should read /AFP/Getty Images)
Newlyweds Princess Diana and Prince Charles are escorted through London to Buckingham Palace in an open horsedrawn carriage, 29th July 1981. (Photo by Jayne Fincher/Getty Images)
The Royal couple, the Prince and Princess of Wales with their young attendants. Sitting, left to right, Catherine Cameron and Clementine Hambro. Standing, left to right, Lord Nicholas Windsor, Edward Van Cutsem, Sarah Jane Gaselee (in front of India Hicks), Prince Edward, the Prince and Princess of Wales, Prince Andrew and Lady Sarah Armstrong-Jones. (Photo by PA Images via Getty Images)
Wedding day of Prince Charles & Lady Diana Spencer, 29th July 1981, Pictured: Bridal attendants at St Pauls Cathedral, RIGHT Lady Sarah Armstrong-Jones (age 17). (Photo by Mirrorpix/Getty Images)
LONDON,UNITED KINGDOM - JULY 29: Diana, Princess of Wales and Prince Charles attend their wedding on July 29, 1981 in London. (Photo by David Levenson/Getty Images) (Photo by David Levenson/Getty Images)
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“We put it down to nerves. But it did make it incredibly difficult for us to get on with making the dress. We had to keep taking the bodice in and changing the pattern," she said according to Express.

Elizabeth explained that when Diana arrived for her first fitting, she was a healthy size 29. But by the last fitting (the designers "lost count" after fitting number 15) her waist measured a mere 23.5 inches. 

In the end, Elizabeth and now ex-husband David, created five different bodies to accompany Diana's ever-shrinking waistline. Explained Elizabeth, “She was incredibly tiny by the end. We literally sewed her into the dress."

However, the gown remains every bit iconic as Diana is today. The train measured to 25 feet, the gown -- made of silk and tulle --was embroidered with 10,000 pearls. It cost over 1,000 pounds (at the time) to make.

"By the end, Diana understood she didn’t even have to say anything: her clothes spoke for her. She was an icon," said Elizabeth.

h/t Express 

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Princess Diana and her fabulous travels
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Princess Diana and her fabulous travels
GIBRALTAR- AUGUST 01: Prince Charles, Prince of Wales and Princess Diana, Princess of Wales, wearing a Donald Campbell dress, leave for their honeymoon cruise on the Royal Yacht Britannia on August 01, 1981 in Gibraltar. (Photo by Anwar Hussein/Getty Images)
The Prince and Princess of Wales leave Gibraltar on the Royal Yacht Britannia for their honeymoon cruise, 1st August 1981. The Princess wears a Donald Campbell dress. (Photo by Tim Graham/Getty Images)
BALMORAL, UNITED KINGDOM - AUGUST 19: The Prince And Princess Of Wales On Their Honeymoon In Balmoral, Scotland (Photo by Tim Graham/Getty Images)
BALMORAL, UNITED KINGDOM - AUGUST 19: Prince Charles With His Arm Around Princess Diana As They Sit On A Style During Their Honeymoon At Balmoral In Scotland.the Princess Is Wearing A Suit Designed By Bill Pashley With A Pair Of Shoes By The Chelsea Cobbler. (Photo by Tim Graham/Getty Images)
15th June 1983: Charles, Prince of Wales, and Diana, Princess of Wales, (1961 - 1997) on holiday in Nova Scotia. (Photo by Central Press/Getty Images)
FRANCE - UNDATED: Princess Diana, Princess of Wales poses in a bikini whilst on holiday in the South of France. (Photo by Anwar Hussein/WireImage)
VIRGIN ISLANDS - UNDATED: Princess Diana, Princess of Wales enjoys a swim in the Virgin Islands. (Photo by Anwar Hussein/WireImage)
FRANCE: The Princess of Wales enjoys a swim in the South of France. (Photo by Anwar Hussein/WireImage) *** Local Caption ***
KLOSTERS, SWITZERLAND - FEBRUARY 1986: Princess Diana, Princess of Wales, wearing red ski gear and a red and white head band, enjoys a skiing holiday in Klosters, Switzerland in February 1986. (Photo by Anwar Hussein/WireImage)
(From left to Right) Prince Charles, Princess Diana, The Duchess of York Sarah Ferguson and The Duke of York Prince Andrew posing for photographers on their skiing holiday at the Swiss resort of Klosters. Wednesday 17th February 1987. (Photo by Kent Gavin/Mirrorpix/Getty Images)
KLOSTERS, SWITZERLAND - FEBRUARY 17: The Duchess Of York (sarah Ferguson) And Princess Diana Having Fun On Holiday In Klosters. (Photo by Tim Graham/Getty Images)
Members of the British Royal Family on a ski holiday, (L-R) Prince Charles, Prince Andrew, Princess Diana and the Duchess of York, in Grisons, Switzerland, February 17th 1987. (Photo by Tim Graham/Getty Images)
Princess Diana on a ski holiday in Klosters, Switzerland, February 6th 1986. (Photo by Tim Graham/Getty Images)
KLOSTERS, SWITZERLAND - FEBRUARY 06: Diana, Princess of Wales, wearing red ski gear and a red and white head band, enjoys a skiing holiday on February 06, 1986 in Klosters, Switzerland. (Photo by Anwar Hussein/Getty Images)
MAJORCA-AUGUST 10: (FILE PHOTO) Princess Diana, Princess of Wales with Prince William and Prince Harry on holiday in Majorca, Spain on August 10, 1987. Also present were the Spanish Royal Family and the Prince of Wales. (Photo by Anwar Hussein/Getty Images)
MAJORCA, SPAIN - AUGUST 08: Prince Charles And Princess Diana With Prince William And Prince Harry On Holiday In Majorca. Also Present Are Queen Sofia Of Spain And Infanta Elena. (Photo by Tim Graham/Getty Images)
PALMA, SPAIN - AUGUST 10: Diana, Princess of Wales poses with Queen Sofia of Spain during a summer holiday in Majorca on August 10, 1987 in Palma, Spain. (Photo by Anwar Hussein/Getty Images)
Princess Diana (1961 - 1997, left) with the Duchess of York during a skiing holiday in Klosters, Switzerland, 9th March 1988. (Photo by James Andanson/Sygma via Getty Images)
Left to right: the Duchess of York, Princess Diana (1961 - 1997) and Prince Charles during a skiing holiday in Klosters, Switzerland, 9th March 1988. (Photo by James Andanson/Sygma via Getty Images)
NECKER ISLAND, BRITISH VIRGIN ISLANDS - JANUARY 9: Diana, Princess of Wales, with Prince Harry on holiday on Necker Island , on January 9, 1989 in Necker Island, British Virgin Islands. (Photo by Julian Parker/UK Press via Getty Images)
NECKER ISLAND, BRITISH VIRGIN ISLANDS - JANUARY 9: Diana, Princess of Wales, on holiday on Necker Island , on January 9, 1989 in Necker Island, British Virgin Islands. (Photo by Julian Parker/UK Press via Getty Images)
NECKER ISLAND, BRITISH VIRGIN ISLANDS - JANUARY 9: Diana, Princess of Wales, on Necker Island , on January 9, 1989 in Necker Island, British Virgin Islands. (Photo by Julian Parker/UK Press via Getty Images)
NECKER ISLAND, BRITISH VIRGIN ISLANDS - JANUARY 9: Diana, Princess of Wales, on Holiday on Necker Island , on January 9, 1989 in Necker Island, British Virgin Islands. (Photo by Julian Parker/UK Press via Getty Images)
NECKER ISLAND - APRIL 11: Princess Diana In Leopardskin Swimming Costume And Sarong On Holiday In Necker Island In The Caribbean (Photo by Tim Graham/Getty Images)
The Prince and Princess of Wales holiday on a yacht with King Constantine II of Greece, 1990. (Photo by Georges De Keerle/Getty Images)
NECKER ISLAND, BRITISH VIRGIN ISLANDS - APRIL 11: Diana, Princess of Wales, with Prince William, on Holiday In Necker Island In The Caribbean, on April 11, 1990, in the British Virgin Islands. (Photo by Julian Parker/UK Press via Getty Images)
SPAIN - AUGUST 15: Princess Diana on holiday in Majorca with King Constantine of Greece and his daughter, Princess Theodora on the King's yacht, Fortuna. (Photo by Tim Graham/Getty Images)
MAJORCA, SPAIN - AUGUST 15: Princess Diana On Board The Yacht Fortuna On Summer Holiday In Majorca (Photo by Tim Graham/Getty Images)
MAJORCA, SPAIN - AUGUST 15: Diana, Princess of Wales, on board the yacht of King Juan Carlos of Spain 'Fortuna' on summer holiday on August 15, 1990 in Majorca, Spain (Photo by Georges De Keerle/Getty Images)
SAINT KITTS AND NEVIS - JANUARY 1993: Diana, The Princess of Wales walks in the sea on January 1993 in the Island of Nevis. (Photo by Julian Parker/UK Press via Getty Images)
Princess Diana (1961 - 1997) in the surf off the Island of Nevis, during a Caribbean holiday, 2nd January 1993.(Photo by Thierry Orban/Sygma via Getty Images)
SAINT KITTS AND NEVIS - JANUARY 1993: Diana, The Princess of Wales walks in the sea on January 1993 in the Island of Nevis. (Photo by Julian Parker/UK Press via Getty Images)
The Princess of Wales (C) watches for a wave while surfing at Indian Castle Beach 02 January 1993. Princess Diana is vacationing with her sons William and Harry. (Photo credit should read PAUL J. RICHARDS/AFP/Getty Images)
SAINT KITTS AND NEVIS - JANUARY 1993: Diana, The Princess of Wales walks in the sea on January 1993 in the Island of Nevis. (Photo by Julian Parker/UK Press via Getty Images)
GIZA, EGYPT - MAY 12: Diana Princess of Wales visiting the Pyramids in Giza during an official tour of Egypt. (Photo by Tim Graham/Getty Images)
GIZA, EGYPT - MAY 12: Diana Princess of Wales visits the Pyramids in Giza during an official tour of Egypt. (Photo by Tim Graham/Getty Images)
SAINT KITTS AND NEVIS - JANUARY 1993: Diana, The Princess of Wales walks in the sea on January 1993 in the Island of Nevis. (Photo by Julian Parker/UK Press via Getty Images)
LECH, AUSTRIA - MARCH 25: Diana, Princess Of Wales, On A Spring Ski-ing Holiday With Her Sons, Prince William And Prince Harry, And Her Friend Kate Menzies. (Photo by Tim Graham/Getty Images)
AUSTRIA - MARCH 26: Diana, Princess of Wales running whilst on a skiing holiday in Lech, Austria (Photo by Tim Graham/Getty Images)
Princess Diana (back row, R), along with her friends Kate Menzies (back row C) and Catherine Soames (back row, L), rides 26 August 1993 the Splash Mountain ride at Disney World's Magic Kingdom during the third day of their vacation. Front row left is Prince Harry, son of Princess Diana. Other passengers are unidentified. (Photo credit should read BOB PEARSON/AFP/Getty Images)
Photo taken on July 14, 1997 shows Britain's Lady Diana taken by an unidentified young girl for a jet-ski ride off the property of her friend Dodi Al-Fayed in Saint Tropez, on the French Riviera. Diana, Princess of Wales, and her companion, the Egyptian millionaire film-producer Dodi al-Fayed, died in Paris early 31 August after a midnight car crash. / AFP PHOTO / Patrick HERTZOG (Photo credit should read PATRICK HERTZOG/AFP/Getty Images)
Photo taken on July 14, 1997 shows Britain's Lady Diana taken by an unidentified young girl for a jet-ski ride off the property of her friend Dodi Al-Fayed in Saint Tropez, on the French Riviera. Diana, Princess of Wales, and her companion, the Egyptian millionaire film-producer Dodi al-Fayed, died in Paris early 31 August after a midnight car crash. / AFP PHOTO / Patrick HERTZOG (Photo credit should read PATRICK HERTZOG/AFP/Getty Images)
ST TROPEZ, FRANCE - JULY 17 1997: (FILE PHOTO) Diana, Princess of Wales and son HRH Prince William are seen holidaying with Dodi Al Fayed (not pictured) in St Tropez in the summer of 1997, shortly before Diana and Dodi were killed in a car crash in Paris on August 31, 1997. The inquests into both of their deaths are due to start in early 2004. (Photo by Michel Dufour/WireImage)
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