Before he got engaged to Princess Diana, Prince Charles proposed to another woman, Amanda Knatchbull.
In Battle of Brothers: William and Harry The Inside Story of a Family in Tumult, royal historian and biographer Robert Lacey explains that Amanda rejected Charles' proposal because she didn't want to live with the public scrutiny of a royal.
The rejection stuck with Charles and reinforced his belief that no one should have to deal with the pressure of marrying into the Windsor family.
When Prince Charles and Princess Diana got engaged, it wasn't totally a gesture of love. Charles was under pressure from the royal family to settle down and Diana seemed liked a perfect match. But before Diana was the perfect match that Charles was pressured to propose to, there was another "perfect match" Charles was pressured to propose to: His cousin (not a first cousin, but still, yeah...) Amanda Knatchbull.
Lacey writes: "Over the years the two cousins did grow close, developing a mutual respect and friendship that has lasted to the present day. But when the prince finally made his proposal in the summer of 1979—shortly before Lord Mountbatten's assassination by the IRA—the independent-minded Amanda politely turned him down."
And the way Amanda turned Charles down had a big impact on the future king.
"The surrender of self to a system, she explained, was so absolute when joining the royal family, it involved a loss of independence 'far greater than matrimony usually invites,'" Lacey writes in the book.
According to Charles' biographer, Jonathan Dimbleby, the rejection "served only to confirm [Charles'] own belief that to marry into the House of Windsor was a sacrifice that no-one should be expected to make."
Princess Diana's Most Iconic Fashion Moments
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(Image credit: Mirrorpix)
August 9, 1997
Princess Diana visited Bosnia to raise awareness of the landmines in 1997. The royal wore her Cartier watch and Tod's loafers.
(Image credit: Pool/Tim Graham Picture Library)
May 22, 1997
Princess Diana visited The Shaukat Memorial Hospital in Pakistan. She wore a traditional blue ensemble and carried a handbag from Tod's, which is named after her.
(Image credit: Tim Graham)
April 21, 1997
Princess Diana wore a Chanel tweed suit set and carried a handbag designed by Lana Marks while visiting the British Lung Foundation.
(Image credit: Pool/Tim Graham Picture Library)
January 13, 1997
For a visit to the Luanda airport, Princess Di wore Superga sneakers.
(Image credit: Mitchell Gerber)
January 1, 1997
Princess Diana spotted in NYC wore a foam green skirt suit and carried a white Chanel bag.
(Image credit: Tim Graham)
September 12, 1996
Princess Diana stunned in a white Versace mini dress while attending a concert in Italy.
(Image credit: New York Daily News)
May 1996
Princess Diana wore a John Galliano slip dress to the Met Gala.
The royal wore a purple Versace dress and Jimmy Choo pumps while attending a gala dinner in Chicago.
(Image credit: Princess Diana Archive)
June 29, 1994
Princess Diana arrived at the Serpentine Gallery in London. She opted for an off-the-shoulder dress by Christina Stambolian. (You can shop a similar one here.)
Princess Diana and Prince William attended the christening of her niece in Sandringham in a houndstooth ensemble and Chanel slingbacks.
(Image credit: Princess Diana Archive)
May 1, 1990
Princess Diana donned a Catherine Walker suit with a Philip Somerville hat to visit Heroes' Square in Budapest.
(Image credit: Tim Graham)
April 11, 1990
The royal enjoyed a beach holiday in Necker with her sons. She chose an animal print one-piece swimsuit and wore a pair of Ray-Ban sunglasses.
(Image credit: Tim Graham)
July 27,1989
Princess Diana attended the performance of Swan Lake in London. She wore a Catherine Walker gown.
(Image credit: Anwar Hussein)
June 1989
Princess Diana and Prince Harry were spotted leaving nursery school. Lady Di wore a pink buttoned dress and accessorized with a Cartier watch.
(Image credit: Georges De Keerle)
March 17, 1989
Princess Diana visited Dubai during her official tour of the Gulf States. Lady Di wore Catherine Walker ensemble and a Philip Somerville hat.
(Image credit: Georges De Keerle)
March 15, 1989
The princess wore a pink and red color block Catherine Walker dress and a Philip Somerville hat during her official tour of the Gulf States.
(Image credit: Georges De Keerle)
November 9, 1988
Princess Diana wore Catherine Walker white ensemble in Chambord, France during her official visit to the country.
(Image credit: Princess Diana Archive)
June 23, 1988
Princess Diana visited the Royal Hampshire Regiment. She was seen wearing a jumpsuit and a pair of pink Converse sneakers.
(Image credit: Georges De Keerle)
June 10, 1988
Princess Diana stepped out to play tennis at the Vanderbilt Raquet Club in London. She wore Reebok sneakers and carried a Wilson racket.
(Image credit: Tim Graham)
July 18, 1986
Princess Diana, seen on the steps of her home in Highgrove, Gloucestershire. She wore gingham trousers, pink sweater, and white boat shoes (shop similar).
(Image credit: Tim Graham)
November 3, 1985
The royal attended a polo match in Australia. She choose a striped shirt dress and accessorized with a D initial necklace and a Patek Philippe gold watch.
(Image credit: Tim Graham)
September 1985
Princess Diana visited Raf Wittering. She opted for a Catherine Walker coat dress.
(Image credit: Tim Graham)
July 1985
Princess Diana wore green Barbour coat during a tour of the Western Isles.
(Image credit: Tim Graham)
June 30, 1985
Princess Diana attended a polo match while wearing a white sailor top, floral skirt, and a Patek Philippe watch.
(Image credit: Tim Graham)
May 4, 1985
Princess Diana wore a Bruce Oldfield dress during a visit to Venice. (Shop a similar blue strong shoulder dress.)
(Image credit: Princess Diana Archive)
April 1, 1985
Princess Diana visited Livorno while wearing a Jasper Conran suit ensemble and tie.
(Image credit: Princess Diana Archive)
February 1985
The royal wore a beige Caroline Charles coat during a visit to Derby.
(Image credit: Princess Diana Archive)
July 29, 1983
Princess Diana attended a polo match in West Sussex while wearing seersucker trousers, a white top, and acetate aviator sunglasses (shop similar).
(Image credit: Tim Graham)
July 24, 1983
Princess Diana attended a polo match in Windsor. She was seen wearing a polka dot dress (shop similar), a coin necklace, and two watches. She was known for wearing two watches during matches to bring Prince Charles luck.
(Image credit: Princess Diana Archive)
June 1983
Princess Diana opted for a Muir Osborne black sheep sweater for a polo match.
(Image credit: Princess Diana Archive)
March 1983
During an official tour to Australia, Princess Diana wore a pink polka dot dress by Donald Campbell (shop similar) and a matching hat by John Boyd.
(Image credit: Tim Graham)
April 1983
Princess Diana wore a green spotted dress and a Patek Philippe watch for a visit to Auckland, New Zealand.
(Image credit: Tim Graham)
May 6, 1981
The royal couple were photographed together at the Balmoral Estate in Scotland. Lady Di wore a colorful alpaca sweater, corduroy trousers, and Hunter rain boots.
Kayleigh Roberts is a freelance writer and editor with over 10 years of professional experience covering entertainment of all genres, from new movie and TV releases to nostalgia, and celebrity news. Her byline has appeared in Marie Claire, Cosmopolitan, ELLE, Harper’s Bazaar, The Atlantic, Allure, Entertainment Weekly, MTV, Bustle, Refinery29, Girls’ Life Magazine, Just Jared, and Tiger Beat, among other publications. She's a graduate of the Medill School of Journalism at Northwestern University.
