Prince Charles' shocking answer to question about loving Princess Diana resurfaces

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Talk about foreboding!

In a hard-to-watch clip that People uncovered, Prince Charles and Princess Diana are shown talking to a reporter during the announcement of their engagement in 1981.

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"...and I suppose, in love?" the reporter asks in the clip.

"Of course," the then-Lady Diana Spencer replies coyly.

"Whatever 'in love' means," Charles responds with an unexpected laugh as Diana giggles nervously in response.

Prince Charles and Princess Diana wed on July 29, 1981 and later divorced in 1996. They share two sons together, William, 34, and Harry, 32. Diana tragically died in a car accident at the age of 36 in 1997.

In an explosive new book, "Prince Charles: The Passions and Paradoxes of an Improbable Life," biographer claims Sally Bedell Smith that the couple was "deeply unhappy, or at least Diana was, from literally Day One of their marriage," as The Sunday Times' royal correspondent explained to ABC News recently.

The uncertainty that Charles expresses in the resurfaced clip is mirrored by the portrait Smith paints of him in her new biography.

"Going into something like this, I think, he felt that was it for life," the correspondent continued to explain. "He wasn't sure of the relationship, and I think he felt incredibly trapped, probably, on the eve of his wedding."

Recently, photos of the former couple went viral, because it appeared as though Prince Charles was much taller than Princess Diana in their official wedding photos, despite the fact that they were essentially the same height.

See photos of the couple together:

31 PHOTOS
Princess Diana and Prince Charles together
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Princess Diana and Prince Charles together
BALMORAL, UNITED KINGDOM - MAY 06: Prince Charles With His Fiance Lady Diana Spencer During A Photocall Before Their Wedding While Staying At Craigowan Lodge On The Balmoral Estate (exact Day Date Not Certain) (Photo by Tim Graham/Getty Images)
BALMORAL - AUGUST 19: Prince Charles, Prince of Wales and Princess Diana, Princess of Wales, wearing a suit designed by Bill Pashley, pose for a photo on the banks of the river Dee in the grounds of Balmoral Castle during their honeymoon on August 19, 1981 in Balmoral, Scotland. (Photo by Anwar Hussein/Getty Images)
UNITED KINGDOM - JULY 29: On July 29, 1981, Lady Diana SPENCER (aged 19) married Prince CHARLES (aged 32) at Buckingham Palace. (Photo by Keystone-France/Gamma-Keystone via Getty Images)
LONDON, UNITED KINGDOM - JULY 29: Prince Charles And Princess Diana On The Balcony Of Buckingham Palace On Their Wedding Day. The Princess Is Wearing A Wedding Dress Designed By David And Elizabeth Emanuel. The Prince Is Wearing Naval Dress Uniform. (Photo by Tim Graham/Getty Images)
LONDRES, ROYAUME-UNI - 10 MARS: Lady Diana et le Prince Charles discutant avec la Princesse Grace de Monaco au Goldsmith's Hall, le 10 mars 1981 a Londres, Royaume-Uni. (Photo by Keystone-France\Gamma-Rapho via Getty Images)
(Original Caption) Queen Elizabeth joins the Prince and Princess of Wales on a Buckingham Palace balcony following their London wedding. (Photo by � Wally McNamee/CORBIS/Corbis via Getty Images)
The Prince and Princess of Wales arrive back at RAF Lossiemouth in Scotland after their honeymoon, September 1981. (Photo by Terry Fincher/Princess Diana Archive/Getty Images)
The Prince and Princess of Wales at the Braemar Highland Games in Scotland, September 1981. She wears a tartan suit by Caroline Charles and a tam o'shanter hat. (Photo by Terry Fincher/Princess Diana Archive/Getty Images)
Prince Charles Prince Charles and the Princess of Wales (1961 - 1997, later Diana, Princess of Wales) at Caernarvon Castle during an official tour of Wales, 27th October 1981. (Photo by Hulton Archive/Getty Images)
UNITED KINGDOM - JUNE 22: Prince Charles, Prince of Wales and Diana, Princess of Wales leave St Mary's Hospital in Paddington with their baby son, Prince William (Photo by Tim Graham/Getty Images)
Prince Charles and Princess Diana at Uluru, Northern Territory on 21 March 1983. . (Photo by Gerrit Fokkema/The Sydney Morning Herald/Fairfax Media via Getty Images)
UNITED KINGDOM - SEPTEMBER 04: The Prince And Princess Of Wales With The Queen Attending The Braemar Games In Scotalnd (Photo by Tim Graham/Getty Images)
(Original Caption) Melbourne, Australia: Princess Diana and the Prince of Wales share a joke with Australian comedian Paul Hogan at a gala performance in Melbourne, April 14th.
Princess Diana (1961 - 1997) and Prince Charles arrive for a state reception in Hobart, Tasmania, 30th March 1983. The princess is wearing the Spencer family tiara and a dress by Bruce Oldfield. (Photo by Jayne Fincher/Princess Diana Archive/Getty Images)
SYDNEY, AUSTRALIA - MARCH 28: The Prince And Princess Of Wales Attending A Charity Ball In Sydney During A Trip To Australia (Photo by Tim Graham/Getty Images)
Princess Diana (1961 - 1997) and Prince Charles leaving St Mary's Hospital, London with their new-born son Prince Harry, September 1984. The Princess is wearing a red coat by Jan van Velden. (Photo by Terry Fincher/Princess Diana Archive/Getty Images)
Princess Diana (1961 - 1997) and Prince Charles at an Italian naval base at La Spezia, 20th April 1985. Charles is wearing a naval Commander's uniform, while Diana is wearing a white coat dress by Catherine Walker. (Photo by Princess Diana Archive/Getty Images)
The Prince and Princess of Wales visit a church in Florence during their tour of Italy, April 1985. The Princess is wearing a suit by Jasper Conran. (Photo by Jayne Fincher/Princess Diana Archive/Getty Images)
VATICAN - APRIL: Diana Princess of Wales with Prince Charles have an audience with Pope John Paul II in the Vatican, Rome, Italy in April 1985 during the Royal Tour of Italy.Diana wore a black lace dress designed by Catherine Walker. (Photo by David Levenson/Getty Images)
Princess Diana (1961 - 1997) and Prince Charles on a skiing holiday in Malbun, Liechtenstein, January 1985. The princess is wearing a Head ski suit. (Photo by Terry Fincher/Princess Diana Archive/Getty Images)
WINDSOR - JUNE 29: Princess Diana, Princess of Wales kisses Prince Charles, Prince of Wales as she presents him with an award following a charity polo match at Windsor Great Park on June 29, 1985 in Windsor, England. (Photo by Anwar Hussein/Getty Images)
WASHINGTON - NOVEMBER 9, 1985: (FILE PHOTO) In this file photo issued October 31, 2005, Prince Charles, the Prince of Wales and Princess Diana, the Princess of Wales meet President Ronald Reagan and First Lady Mrs Nancy Reagan at the White House on November 9, 1985 during an official visit to America in Washington DC, USA. Prince Charles, the Prince of Wales is taking his new wife Camilla the Duchess of Cornwall on a visit to the United States which begins formally on November 1, 2005 (Photo by Tim Graham/Getty Images)
VANCOUVER, CANADA - MAY 03: The Prince And Princess Of Wales During A Visit To Vancouver, Canada. She Is Wearing A Suit Designed By Fashion Designer Bruce Oldfield (Photo by Tim Graham/Getty Images)
LONDON - AUGUST 4: Prince Edward, Viscount Linley, Prince Charles, Diana, Princess of Wales and the Queen at the Queen Mothers 87th birthday celebration on August 4, 1987 at Clarence House in London, England. Diana wore a dress designed by Catherine Walker. (Photo by David Levenson/Getty Images)
WINDSOR, UNITED KINGDOM - JUNE 26: The Princess Of Wales Presents A Medal To Her Husband, Prince Charles, After A Polo Match At Windsor (Photo by Tim Graham/Getty Images)
AUSTRALIA - JANUARY 30: Diana, Princess of Wales and Prince Charles, Prince of Wales at the Central Coast Surf Carnival at Terrigal Beach, Sydney, Australia (Photo by Tim Graham/Getty Images)
ABU DHABI, UNITED ARAB EMIRATES - MARCH 15: The Prince And Princess Of Wales attend a desert picnic on March 15, 1989 in Adu Dhab, United Arab Emirates. (Photo by Georges De Keerle/Getty Images)
DUBAI, UNITED ARAB EMIRATES - MARCH 16: The Prince And Princess Of Wales On A Walkabout In Dubai On The Gulf Tour. Diana's Outfit Is By Fashion Designer Catherine Walker And Hat By Milliner Philip Somerville. (Photo by Tim Graham/Getty Images)
Princess Diana (1961 - 1997), wearing a Belville Sassoon dress, presenting Prince Charles with a trophy after competing at the Hola Cup polo match at the Guards Polo Club, Windsor, 29th June 1988. (Photo by Jayne Fincher/Princess Diana Archive/Getty Images)
PARIS - NOVEMBER: Prince Charles and Diana Princess of Wales meet guests arriving at a dinner in the Elysee Palace in Paris, France in November 1988, during the Royal Tour of France. Diana wore a dress designed by Victor Edelstein. (Photo by David Levenson/Getty Images)
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