Most recently, the couple made a trip to South Wales where they visited an amusement arcade and met with residents at a care home.
Prince William is second in line to the British throne which means both him and Kate are likely to have very important roles in the Royal Family.
While the Duchess of Cambridge has been a senior royal for many years, it is thought she has gradually taken on more duties.
Analysing pictures from over the years, body language expert Judi James explained there has been a shift in how she handles her role.
This year, the royal has appeared more relaxed when at engagements.
Judi said: “Kate is often being seen trying to make her husband laugh in public and indulging in more frequent bouts of actual laughter herself when she is making royal visits.”
When making more appearances, the royal could be trying to show a different side of herself.
During the lockdown, Kate also let more of her personality come across as she opened up about her struggles.
Despite possibly taking on an increasing workload, Kate has grown more confident in her role.
The mother-of-three appears happy to represent the monarch both at events with her husband or by herself.
Judi added: “She seems happier to acknowledge that she is popular in her own right now and that she has earned the respect and possibly admiration of the Queen too.”
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How did Kate Middleton become a royal?
Kate Middleton, or Catherine, Duchess of Cambridge, was born on 9 January 1982 at the Royal Berkshire Hospital, Reading, England.
She was born to Michael and Carole Middleton, a former flight dispatcher and air hostess. The couple founded a party supplies company, Party Pieces, in 1987 – now estimated to be worth £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-speaking nursery school.
After moving back to Berkshire the family sent Kate to private school, St Andrews School. She went on to briefly study at Downe House before moving onto Marlborough College where she boarded.
For university the young Kate attended the University of St Andrews in Fife, Scotland. Here she was awarded an undergraduate MA (2:1 Hons) in history of art.
Relationship with Prince William
Kate met Prince William when they were both studying at St Andrews, and both living in St Salvator’s Hall. Famously, William reportedly took a fancy to Kate after she wore a see-through dress during a fashion show.
In 2003 the couple began dating and lived together during their second year of university.
The couple split in April 2007, however, in October they were back together.
Prince William proposed to Kate Middleton with his late mother Princess Diana’s engagement ring in October 2010. The couple were holidaying in Kenya at the time.
On 29 April 2011 they married at Westminster Abbey with a whopping 26 million watching the event live.
Kate wore an Alexander McQueen dress worth a reported £250,000 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.