Since she has fully embraced life as a royal and as the future Queen of Britain.
She had has three children who are the heirs to the throne, Prince George, five, Princess Charlotte, three, and Prince Louis who was born in April.
She has also lent her time to many charitable causes over the years.
During her first year of marriage Kate Middleton got stuck into charity work.
Following in the footsteps of many royals before her, she chose the route of becoming a patron to charities that work for causes close to her heart.
A patron is as someone who gives financial support to an organisation.
The royal website states: “Currently, over 3,000 organisations list a member of the Royal Family as their patron or president.”
Nine months into royal life the Duchess revealed she would be the patron of four charities.
They were Action on Addiction, East Anglia’s Children Hospices, art therapy charity the Art Room, and the National Portrait Gallery.
These reflected her interest in art and in children’s welfare.
She has since become a passionate advocate for children’s mental health.
In February this year Kate created a video to promote Children’s Mental Health Week.
In the video, made with charity Place2Be, Kate said: “Childhood is an incredibly important moment in our lives.
“It is the time when we explore our personalities, discover the potential that lies within us and learn how to be ourselves.
“Our experience of the world at this early stage helps to shape who we become as adults, how we begin to feel comfortable in our own skin.”
Kate Middleton and Prince William’s parenting techniques have recently been revealed by a source.
Yahooo! Lifestyle reported via US Weekly that the Duke and Duchess want to raise their children very normally.
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 become the Duchess of Cambridge on the day.