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Princess Margaret married Antony Armstrong-Jones after her split from Group Captain Townsend
In the smash-hit royal drama, Margaret embarks on an affair with divorcée Group Captain Peter Townsend.
Although the public are in full support of the match, the Cabinet insist that Queen Elizabeth intervenes and break the pair up because the Church of England does not allow for divorcées to remarry.
The series ends with Margaret single, heartbroken and full of resentment towards her sister.
But in real-life, what happened next?
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Who did Princess Margaret marry?
Just over four years after the split, Margaret became engaged to photographer Antony Armstrong-Jones.
She reportedly accepted his proposal after discovering that Group Captain Townsend was to marry another woman.
The announcement came as a surprise to the public as the couple had concealed their romance from the press.
The couple married at Westminster Abbey on May 6, 1960, with Princess Anne as a bridesmaid and Prince Philip escorting the bride down the aisle.
Most European royal families boycotted the wedding, disproving of the Princess marrying a commoner.
Margaret and Antony announced their engagement in 1960
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The ceremony was the first royal wedding to be broadcast on television with 300 million people watching across the world.
Margaret and Antony, who was created Earl of Snowdon, had two children – David, born November 3, 1961, and Sarah, born May 1, 1964.
But their marriage was dogged by rumours of extra-marital affairs on both sides, and the couple split in 1976 after pictures were published of the Princess in the company of another man, Roddy Llewellyn.
The couple married at Westminster Abbey
More than 300 million people watched the ceremony on TV
Lord Snowdon went on to remarry just months after their divorce was finalised.
However Margaret remained single until her death on February 2, 2002, although she was linked to several men by the press.
The divorce and scandal earned the Princess negative publicity, but paved the way for royals such as Prince Charles and Prince Andrew to divorce in later years.
The Snowdons had two children – David and Sarah
Why didn’t Princess Margaret marry Group Captain Peter Townsend?
In The Crown, viewers watched as Princess Margaret fought for the right to marry Group Captain Peter Townsend.
Under royal laws, the young Princess had to seek permission from her sister Queen Elizabeth in order to marry her lover.
The Queen asked her sister to wait until she was 25, by which time she would not need the monarch’s permission.
But after holding off for two years, Margaret was told that the Cabinet would never approve the engagement because Group Captain Townsend was a divorcée.
Princess Margaret and Group Captain Townsend were split up by the Queen and her Cabinet
She was faced with a choice – to marry, renounce all of her rights and allowances and be forced to live abroad, or to leave Group Captain Townsend.
In 2009, a previously unseen letter revealed that the Queen and Prime Minister Anthony Eden drew up a plan that would allow Margaret to marry her lover by removing her and any children she might bear from the line of succession.
Margaret would have been allowed to keep her royal title and all the allowances that came with it, and could have remained in the country and continued with public duties.
But three days after the final draft of the proposal was produced, Margaret issued a statement announcing that she would not marry Group Captain Townsend.
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Released on October 31, 1955, it said: “I would like it to be known that I have decided not to marry Group Captain Peter Townsend. I have been aware that, subject to my renouncing my rights of succession, it might have been possible for me to contract a civil marriage.
“But mindful of the Church's teachings that Christian marriage is indissoluble, and conscious of my duty to the Commonwealth, I have resolved to put these considerations before others.
“I have reached this decision entirely alone, and in doing so I have been strengthened by the unfailing support and devotion of Group Captain Townsend.”