I have spent a lot of time attending weddings on both sides of the pond.
A lot—as in, I have attended over 30 weddings in the past five years—including five American/British combos.
A significant difference in so-called love matches was that the upper class had to pick potential spouses from a select pool.
But the requirements don't stop there—the 1701 Act of Settlement prohibits royals from marrying Catholics.
To wed the Queen's eldest grandchild Peter Phillips in 2008, Autumn Kelly converted from Roman Catholicism to Anglicanism so her husband would keep his place as 11th in line for the throne.
But in the UK, groomsmen have taken the tradition even farther, now celebrating over an entire weekend's worth of festivities known as a stag weekend.
While details are scarce, Will's office confirmed that the Prince's party took place in late March (about a month before the wedding).