She wore a huge ivory silk taffeta gown and held a stunning bouquet of flowers that included white gardenias, orchids and lily of the valley.
And during the preparations for the wedding, Diana had a special request when it came to her bouquet – she wanted two, reports MailOnline.
That’s because according to a new documentary, she wanted one laid on the Tomb of the Unknown Warrior at Westminster Abbey.
Florist David Longman, who was in charge of the flowers at the 1981 wedding told The Wedding of the Century, that features on Britbox: “She was very easy to deal with. She wasn’t particularly demanding. She was always charming.
“If you look at the photographs from Princess Elizabeth’s wedding, you will see that the big photograph with all the bridesmaids, everyone is carrying a bouquet, except the bride.
“The princess asked for her bouquet to be put on the tomb of the Unknown Warrior. Lady Diana had heard this story so she said: ‘Please can we have two bouquets?’
“So, we had one that went straight onto the tomb and the other that was delivered to Buckingham Palace ready for the photographs.”
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However, the bouquet wasn’t the only thing that was duplicated for Diana’s big day as two dresses were also created.
The job of designing Diana’s dress went to David and Elizabeth Emanuel, who went to great lengths to ensure the design was kept a secret.
The couple even destroyed their sketches straight after they’d been shown to Diana to make sure they could never fall into the wrong hands.
But in case the design was to be leaked, another dress was created as a back-up option.
David told People : “At the time we wanted to make absolutely sure that the dress was a surprise.
“We didn’t try it on Diana. We never even discussed it. We wanted to make sure that we had something there; it was for our own peace of mind, really.”
Charles and Diana exchanged their vows at St Paul’s Cathedral despite having only met a handful of times.
They said ‘I Do’ in front of 3,500 invited guests, including the royal family, celebrities and world leaders, with a further 750 million people around the world watching on TV.
They divorced in 1996, just a year before Diana tragically died following a car crash in Paris.