And as it turns out, the couple are already distantly related!
The princess and wine merchant are distant cousins - specifically third cousins once removed.
The pair share an ancestor in common, the 2nd Earl of Leicester Thomas William Coke.
Princess Eugenie is a descendant from Cooke's first wife Juliana Whitbread, while Brooksbank is a descendant from Coke's second wife, Georgina Caroline Cavendish.
Their shared ancestor is Eugenie's great-great-great-great grandfather, on her mother Fergie's side of the family and the great-great grandfather to her fiance.
The connection between the two was discovered by Business Insider on Peerage.com.
Though it may seem a little odd, the couple aren't the only royals to share a common ancestor.
Queen Elizabeth and Prince Philip are also distantly related, as second cousins once removed.
They share the same great-great grandmother of Queen Victoria.
Talk about keeping it in the family!