Prince Andrew and Sarah Ferguson are "best friends" but won't remarry.
The British royal and his ex-wife have continued to be close since they divorced 17 years ago, but have played down speculation they are to rekindle their romance.
A source told Hello! magazine they would not get back together but added: "They continue to be joint parents and best friends and try to set the best example for the girls."
The Duchess and Prince Andrew have daughters Princess Beatrice, 25, and Princess Eugenie, 23, together and are often pictured as a family, as well as holidaying together regularly.
The Duchess of York, 53, has also continued to live in the same grounds of the Royal Lodge as the Duke, also 53, since their divorce.
It has been suggested Duchess Sarah's notoriously frosty relationship with the Queen may be improving, as she was invited to Balmoral - the royal Scottish retreat - earlier this month, alongside Prince Andrew and their daughters, thought to be her first official invite from the monarch since 1992.
In 2009, Prince Andrew appeared to have warmed to idea of remarrying the Duchess.
He said: "Do we have to be married? Well, let's put it another way, I can neither confirm nor deny the possibility. We have two great children. We still look after them."
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