According to Express.co.uk, British betting agents have seen odds for the royal duo to remarry skyrocket in recent months with Coral bookmakers running 2/1 that the Duke and Duchess of York will tie the knot again at some time in the future.
The current odds are 8/1 for the parents of Princesses Beatrice and Eugenie to announce a royal engagement this year.
Prince Andrew, who is Queen Elizabeth and Prince Phillip's second son, married the fiery red head in 1986 but divorced ten years later.
Despite numerous controversies and a bitter feud between the former Duchess and the Duke of Edinburgh, Andrew and Fergie have maintained a famously close relationship.
Interest in a royal reunion has intensified since Princess Eugenie's marriage to Jack Brooksbank in October 2018 which saw Fergie unofficially welcomed back into the Windsor fold.
Betfair spokeswoman Katie Baylis told the Express: "Fergie and Andrew have remained close friends since their split and the fact she is constantly publishing pictures of her and her ex-husband has started to lead to speculation that the pair could be about to announce a right royal reunion."
The news comes just over one month after New Idea reported the former couple have even been living together for years despite being legally separated.