The eyes of the world turn to the U.K. as the world's most popular royal family welcomes American Meghan Markle into the fold.
Of course, some rules are meant to be broken.
A survey found that 66 percent of Brits aren't interested in this weekend's celebrations.
As it turns out, a member of the public marrying a royal has happened a fair bit in the past.
There were 16 kings of France called Louis before the start of the French Revolution in 1789.
Harry was William's best man back in 2011.
Prince William, Kate Middleton, Prince George and Princess Charlotte have a new family member.
Prince Harry said his future wife is "hugely excited" to get involved in the commonwealth organization.
The sequence in which members of the Royal Family would come to the throne if the reigning monarch died or abdicated.
"Harry & Meghan: A Royal Romance" is slated to premiere this spring.
Prince Harry's fiancée disappears from social media.
Along with Prince Harry, she greeted a crowd gathered outside St Mary Magdalene Church in Sandringham.
"There is a profound sense of commitment and seriousness both about their faith and about their lives together."
Royal watchers believe the Duchess of Cambridge wore a maternity dress from Jenny Packham's Fall 2017 line to the Royal Variety Performance.
The Duke of Cambridge said new ideas were needed on how to manage water resources and the grazing of animals.
The heir to the British throne also honored first responders to the attack on an Ariana Grande concert in May.