When a direct heir to the throne marries, it attracts the interest of the world as well as the opulence of a royal marriage.
William married his seven-year-old girlfriend, whom he had met at university in Westminster Abbey.
The marriage took place 30 years after the fatal nuptials of Prince charles and princess Diana.
But how did the two men differ on their wedding days and what can this tell us about them?
Judi James, a body language expert, revealed his thoughts to Express.co.uk.
She claimed that Charles was shy and insecure on the day of his marriage to Diana, with the ambition of pleasing others rather than himself.
Judi said, “With his beautiful, very young bride on one side and his mother on the other, Charles seemed like a man desperate to do the right thing, although he was not totally in charge of his own marriage.
"He asked his mother if he could kiss the bride, and that shy, slightly confused smile suggested a man driven by events."
Judi revealed that Prince William's wedding day was a stark contrast.
"William, on the other hand, seemed very responsible in his own marriage," she said.
“He stands and confident here, with a wide, open-mouthed smile that suggests he is enjoying the day.
“Although younger than his father when he married, he seems very confident with Charles's suspicious and anxious young man.
"Their touch gestures with Kate showed a synchronicity that reflected the fact that they had known each other for many years and had strong ties of empathy and love."
Kate Middleton and Prince William Surprise with a glamorous PDA this week, showing that there is still much love in marriage for many years.
Judi James, a body language expert, told Express.co.uk: “Sometimes it's the subtler gestures that can say more about couple relationships than more open-minded PDAs, especially with a longtime couple like William and Kate, like this micro ritual. test. "
Kate and Prince William are known to be less receptive to affection than their royal counterparts, Prince Harry and Meghan Markle.
She was the so-called “commoner” before marrying the royal family, but the Duchess of Cambridge was hardly her common British before.
What was Kate Middleton Net Worth before marrying William?
According to wealth tracking firm Wealth-X, Kate worked £ 5 million before she even met William.
How did Kate Middleton become royalty?
Kate Middleton, or Catherine, Duchess of Cambridge, was born on January 9, 1982 at the Royal Berkshire Hospital, Reading, England.
She was born to Michael and Carole Middleton, a former flight dispatcher and stewardess. The couple founded a party supply company, Party Pieces, in 1987 – now estimated at $ 30 million.
Kate has a younger sister, Pippa Matthews, 34, and a younger brother, James Middleton, 31.
Kate and her family moved to Amman, Jordan, in 1984, where the future duchess was educated at an English-language nursery school.
After returning to Berkshire, the family sent Kate to a private school, St. Andrews School. She studied briefly at Downe House before moving to Marlborough College, where she boarded.
For college, young Kate attended St Andrews University in Fife, Scotland. Here she received a master's degree (2: 1 Hons) in art history.
Relationship with Prince William
Kate met Prince William when they both studied at St. Andrews and both lived at St. Salvator's Hall. Famously, William would have liked Kate after she wore a transparent dress during a fashion show.
In 2003, the couple started dating and lived together during their sophomore year of college.
The couple broke up in April 2007, however, in October, they were together again.
Prince William asked Kate Middleton with mother Diana's engagement ring, Princess Diana, in October 2010. The couple were on holiday in Kenya at the time.
On April 29, 2011, they married Westminster Abbey with 26 million people attending the event live.
Kate was wearing a 250,000-pound Alexander McQueen dress on the big day.
Kate assumed the title "Her Royal Highness, the Duchess of Cambridge" and also became the Duchess of Cambridge on the day.