Sarah Ferguson and Prince Andrew married in 1986.
They legally divorced in 1996, but were separated before this.
Despite their split many fans still express their wishes the couple could reunite.
This was evidenced when the Duchess posted a picture of some beautiful flowers for a special occasion.
She captioned the image: “Happy 4th July and so much thankfulness for all your generous hearts.
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“I love the USA. #4thjuly #happyindependenceday #america #usa”
One fan replied to the Duchess of York, and said: “I love you Sarah.
“When are you and Andrew getting hitched again? You two belong together.
“I can’t wait for Eugenie wedding. It will be a grand day!”
One the same post on Twitter, another repeated the sentiment.
They wrote: “We love you too !!!! When are you and Andrew going to remarry?”
Sarah and Andrew are currently looking forward to their youngest daughter’s wedding.
Princess Eugenie, 28, will marry fiancé Jack Brooksbank, 32, in October.
The Princess, a granddaughter of the Queen, once described her parents as “the best divorced couple I know.”
A palace insider revealed to Express.co.uk how the couple still live together in the Royal Lodge in Windsor.
Sarah Ferguson and Prince Andrew have lived there together since the Queen Mother died, the source claimed.
The Duchess was recently seen drinking wine with her daughter Princess Beatrice, 29, in France this week.
Sarah Ferguson was at the Club 55 in St Tropez.
The Duchess wore a white sun dress with sheer details and a button down front.
She added some bohemian jewellery, a long green beaded necklace and a gold medallion.