Kate Middleton and Prince Williams have been married since April 29, 2011. Here is a complete timeline of their relationship.

Kate and Prince William have three children. Their first son, Prince George Alexander Louis, was born on July 22, 2013. The couple's daughter, Princess Charlotte —who was named Charlotte Elizabeth Diana in honor of Prince William's late mother — Princess Diana, followed on May 2, 2015.

However, Harrold said he's noticed one area in which Prince William differs quite a bit from his grandmother. "The late Queen always used to say that she put monarchy over family," he said. "Admittedly she did occasionally put family first in ways that contradict this, but she did say it often. I think William is very different."