Inside Princess Margaret's marriage to Antony Armstrong-Jones

The new season of The Crown introduces Princess Margaret’s future husband, Antony Armstrong-Jones, to the Netflix hit's viewers. The late society photographer, later titled Lord Snowdon by Queen Elizabeth, is played by "Downton Abbey" alum Matthew Goode. Margaret is played by Vanessa Kirby.

But the true story of the couple's real-life relationship is just as fascinating as any TV show.

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The pair married in 1960 and divorced 18 years later, staying on good terms until Margaret’s death in 2002. He was the first commoner in over 400 years to marry into the royal family.

For one, leading up to their marriage, Armstrong-Jones was having an affair with one of his closest friends’ wives, Camilla Fry. 

See photos of Princess Margaret and Antony Armstrong-Jones together:

9 PHOTOS
Princess Margaret and Antony Armstrong-Jones together
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Princess Margaret and Antony Armstrong-Jones together
The newly-wed Princess Margaret, the younger sister of Britain's Queen Elizabeth II, and her husband, the photographer Antony Armstrong-Jones wave 06 May 1960 from Buckingham Palace in London on their wedding day. Armstrong-Jones was later created Earl of Snowdon. They had two children, son Linley, and daughter Sarah, but announced their separation in March 1976. When the marriage was officially ended two years later, Margaret became the first royal to divorce since Henry VIII in the 16th century. (Photo credit should read /AFP/Getty Images)
Princess Margaret (1930 - 2002) and Antony Armstrong-Jones in the grounds of Royal Lodge after they announced their engagement. (Photo by Hulton Archive/Getty Images)
27th February 1960: Princess Margaret (1930 - 2002) and her fiance, Antony Armstrong-Jones, stroking their pet King Charles Spaniel, at the Royal Lodge, Windsor. (Photo by Central Press/Getty Images)
29th February 1960: Princess Margaret (1930 - 2002) and Antony Armstrong-Jones announce their intention to marry, photographed at Royal Lodge, Windsor. (Photo by Fox Photos/Getty Images)
1961: Cradling her new born son David Albert Armstrong-Jones (Viscount Linley) in her arms Princess Margaret Rose (1930 - 2002) waves to the crowds. In the car with her is her husband Antony Armstrong-Jones, Earl of Snowdon. (Photo by Evening Standard/Getty Images)
LONDON, UNITED KINGDOM - JANUARY 20: At London airport, Princess Margaret with husband Antony Armstrong Jones wave farewell to Queen Elizabeth and Duke of Edinburgh leaving for a tour in India and Pakistan on January 20, 1961 in London, United Kingdom. (Photo by Keystone-France/Gamma-Rapho via Getty Images)
LONDON, UNITED KINGDOM: Princess Margaret (L), holding her son Linley, leaves 01 December 1961 with her husband Antony Armstrong-Jones Lord Snowdon the Clarence House in London where they met the Queen Mother (R). Princess Margaret and Lord Snowdon had two children, son Linley, and daughter Sarah, but announced their separation in March 1976. When the marriage was officially ended two years later, Margaret became the first royal to divorce since Henry VIII in the 16th century. (Photo credit should read AFP/Getty Images)
Princess Margaret and husband Antony Armstrong-Jones at state ball during Jamaican independence celebration. (Photo by Ray Fisher/The LIFE Images Collection/Getty Images)
BADMINTON, ENGLAND - APRIL 18: Princess Margaret with her husband, born Antony Armstrong-Jones, photographer Lord Snowdon attend Badminton Horse Trials on April 18, 1970 in Badminton, England. (Photo by Anwar Hussein/WireImage)
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Camilla gave birth to their daughter, Polly, three weeks into Armstrong-Jones' honeymoon with Princess Margaret. Polly didn’t learn Armstrong-Jones was her biological father until taking a DNA test in 2004.

“['The Crown'] is very explicit about the promiscuity of Armstrong-Jones -- and Margaret wasn’t aware of it," royal historian Robert Lacey told People about the show's second season. "That will open a lot of people’s eyes."

Another source of interest has long been Armstrong-Jones' rumored bisexuality.

"I didn't fall in love with boys, but a few men have been in love with me," he once said.

Princess Margaret learned her ex-lover, Group Capt. Peter Townsend, planned to wed another woman, despite a pact to never marry anyone else. Her biographer, Christopher Warwick, told People that she once pointed out that she married Tony five years after that split -- so it wasn't necessarily a conscious rebound.

Regardless of what spurred their marriage, Margaret and Tony enjoyed a glamorous live in the '60s together.

"Stories about them were legion, with their star-studded parties at Kensington Palace," Warwick said. "If you were invited by them, you were being invited to breathe in rarified air.”

See photos of Princess Margaret's sister Queen Elizabeth II at her own wedding:

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Queen Elizabeth and Duke of Edinburgh's wedding
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Queen Elizabeth and Duke of Edinburgh's wedding
Princess Elizabeth, later Queen Elizabeth II with her husband Phillip, Duke of Edinburgh, after their marriage, 1947. (Photo by © Hulton-Deutsch Collection/CORBIS/Corbis via Getty Images)
UNITED KINGDOM - NOVEMBER 20: November 20, 1947: Princess ELIZABETH and the Duke of Edinburgh after the wedding ceremony. (Photo by Keystone-France/Gamma-Keystone via Getty Images)
20th November 1947: Princess Elizabeth and The Prince Philip, Duke of Edinburgh waving to a crowd from the balcony of Buckingham Palace, London shortly after their wedding at Westminster Abbey. (Photo by Keystone/Getty Images)
Photograph of Princess Elizabeth and Prince Philip, Duke of Edinburgh on their wedding day. Dated 20th Century. (Photo by Universal History Archive/UIG via Getty Images)
Sir Philip Mountbatten, newly titled Duke of Edinburgh (front, second from right), with fellow Royal Navy officers at his bachelor party at the Dorchester Hotel, London, 19th November 1947. Seated to the right of him is his uncle, Louis Mountbatten, 1st Earl Mountbatten of Burma (1900 - 1979) and to the left, Captain McGregor. Philip is to marry Princess Elizabeth (later Queen Elizabeth II) the following day. (Photo by Keystone/Hulton Archive/Getty Images)
1947: H R H Princess Elizabeth and Philip Mountbatten, Duke of Edinburgh, on the occasion of their engagement at Buckingham Palace in London. (Photo by Fox Photos/Getty Images)
1947: Princess Elizabeth and the Duke of Edinburgh. (Photo by Central Press/Getty Images)
Newly married Princess Elizabeth and Prince Phillip, Duke of Edinburgh during their honeymoon in Malta. (Photo by © Hulton-Deutsch Collection/CORBIS/Corbis via Getty Images)
July 1947: Princess Elizabeth in the state apartments at Buckingham Palace during her engagement to The Prince Philip, Duke of Edinburgh. (Photo by Fox Photos/Getty Images)
Princess Elizabeth (later Queen Elizabeth II) and naval Lieutenant Philip Mountbatten (later Duke of Edinburgh) photographed for the first time since the announcement of their engagement, 10th July 1947. (Photo by Central Press/Hulton Archive/Getty Images)
14th November 1947: Mr Schur, chief confectioner at McVitie and Price, putting the final touches to the wedding cake of Princess Elizabeth and The Prince Philip, Duke of Edinburgh. The cake has four tiers and is nine feet high. (Photo by J. A. Hampton/Topical Press Agency/Getty Images)
UNITED KINGDOM - NOVEMBER 20: Wedding Of Princess Elizabeth And The Duke Of Edinburgh. Princess Elizabeth And The Duke Of Edinburgh On The Balcony Of Buckingham Palace. To The Right Of The Princess Is The Marquess Of Milford Haven, Witness The Duke Of Edinburgh On November 20Th, 1947 (Photo by Keystone-France/Gamma-Keystone via Getty Images)
UNITED KINGDOM - NOVEMBER 20: Wedding Of Princess Elizabeth And Duke Of Edinburgh. Photo Taken At Buckingham Palace. On November 20Th, 1947 (Photo by Keystone-France/Gamma-Keystone via Getty Images)
UNITED KINGDOM - NOVEMBER 20: Wedding Of Princess Elizabeth And Duke Of Edinburgh. The Royal Procession Arriving At Buckingham Palace. On November 20Th, 1947 (Photo by Keystone-France/Gamma-Keystone via Getty Images)
20th November 1947: Princess Elizabeth, and The Prince Philip, Duke of Edinburgh at Buckingham Palace after their wedding. (Photo by Hulton Archive/Getty Images)
UNITED KINGDOM - NOVEMBER 20: Wedding Of Princess Elizabeth And Duke Of Edinburgh. On November 20Th, 1947 (Photo by Keystone-France/Gamma-Keystone via Getty Images)
20th November 1947: Princess Elizabeth leaving Westminster Abbey, after her wedding to The Prince Philip, Duke of Edinburgh. (Photo by Topical Press Agency/Getty Images)
29th July 1949: Princess Elizabeth and her husband Philip, Duke of Edinburgh complete their tour of West Riding in Yorkshire with a visit to the city of York. (Photo by PNA Rota/Getty Images)
21st October 1950: Princess Elizabeth (later Queen Elizabeth II) holding her daughter Princess Anne at her christening in Buckingham Palace, with the Duke of Edinburgh at her side. (Photo by Topical Press Agency/Getty Images)
Prince Philip, the Duke of Edinburgh, and Princess Elizabeth following the Archbishop of Canterbury in a procession to Canterbury Cathedral, Kent, July 31st 1949. (Photo by Fred Morley/Fox Photos/Getty Images)
CANADA - JANUARY 01: Canada, Princess Elizabeth And The Duke Of Edinburgh Posing With Canadian Mounties In 1951 (Photo by Keystone-France/Gamma-Keystone via Getty Images)
Undated picture showing the Royal British couple, Queen Elizabeth II, and her husband Philip, Duke of Edinburgh, with their two children, Charles, Prince of Wales (L) and Princess Anne (R), circa 1951. (Photo credit should read OFF/AFP/Getty Images)
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