Many royal watchers suspected Princess Eugenie to be pregnant after English bookies slashed the odds on Princess Eugenie and husband Jack Brooksbank announcing a royal baby last month, which is historically one of the tell-tale signs of truth behind royal rumours.
But now royal fans are utterly convinced that the couple is expecting their first child due to this unofficial - yet common - royal trend.
Royal expert Robert Jobson revealed the telling clue to Express.co.uk: “The royals do tend to have babies quite soon after they are married.”
This is certainly the case for the Duke and Duchess of Sussex, who were married May 2018 and made their pregnancy announcement just six months after the royal wedding, on October 15.
At the moment of announcement, Meghan is believed to be about three months pregnant, meaning the baby could have been conceived in July, around three months after her wedding to Prince Harry.
Interestingly, it was also three months after Queen Elizabeth's marriage to Prince Philip before they got pregnant with Prince Charles.
We'll just have to wait and see!