And they shared new, insider details about the big day.
One of Prince William's closest friends is marrying a teacher from George's school.
"If your husband’s called king, you’re called queen," says former BBC royal correspondent Jennie Bond.
The Duke of Sussex's grandad is reported to have told him: ‘One doesn’t marry actresses’.
Prince Harry and Meghan Markle's son will reportedly be christened next month.
The photo shows the Duke of Cambridge making a face at his one-year-old son, Prince Louis.
Harry is said to want to continue Princess Diana's charity work on landmines in Angola.
Kate wore a dress by London-based, Brazil-born designer Barbara Casasola.
Harry and Meghan are said to be heading off to Africa on tour later this year.
“You go back a couple of generations and it was literally like waxworks coming out, it was very stiff and there wasn’t much hands-on parenting at all.”
This may be the next time we get to see Meghan and Harry's baby.
It's all down to the position a royal holds within the military.
Louis has already perfected his royal wave.
Kate turned to her wedding dress designer once again.
The Duchess of Sussex gave birth to son Archie last month.
Kate looked regal in a cream Catherine Walker outfit.
Everything you need to know.
'Meghan wants to see out the entire summer before she really contemplates going back to work.'
"She’s a very good influence on Harry.”
Kate also debuted her new insignia from the Queen.
All eyes were on Donald Trump as he was greeted by the Queen at Buckingham Palace.
The US president made a few slip-ups during his last meeting with the Queen.