Hilary Duff has been called "America's most royal celebrity" because she's more closely related to Queen Elizabeth II than any other American in Hollywood is.
They're 18th cousins through Alexander Spotswood, the 10th great-grandson of King Edward III.
Yeah, especially when you look at the Plantagenets side of the English royals. What a Rollercoaster loopying circle of a familytree...
Yeah - most people with English blood are probably related to some royal family members.
which makes most of America, Canada, South Africa, Australia, New Zealand etc etc
https://en.wikipedia.org/wiki/Kinship#Degrees
Fourth cousin have 0.20% genetic overlaps which is explained as " This degree of relationship is usually indistinguishable from the relationship to a random individual within the same population (tribe, country, ethnic group)."