Both were middle-class commoners when they married into their respective royal families.
So, perhaps comparisons between Queen Mary and our own Princess of Wales were inevitable.
HELLO! speaks with royal reporter Wim Dehandschutter, who reveals the Danes' reaction to Queen Margrethe's abdication and why Australian-born Crown Princess Mary is so popular
Queen Margarethe of Denmark surprised royal watchers on Sunday as she revealed she will be abdicating next month, meaning Crown Princess Mary will become Queen
Crown Prince Frederik pictured holding hands with Princess Mary at Aarhus Cathedral with their children, weeks after Mexican socialite Genoveva Casanova denied a romantic relationship with the Danish heir to the throne