The royal biographer told True Royalty TV’s Royal Beat: “I think that Kate has helped save William.
“I think it was very difficult for him coming out of a dysfunctional family, losing his mother so young and I think he was in a very difficult place to have a long, strong relationship.
“And she’s really encouraged him.
Kate “helped” Prince William by introducing him to the Middleton family, according to a royal expert
Royal author Angela Levin claimed the Duchess of Cambridge dedicates her life to making her husband happy
“She found things that really make him feel important and worthy rather than just going to cut ribbons.
“I think she has helped him be a husband by introducing him to her own family a lot and spending time with a normal family and also being a dad.”
The couple met when they were both students at the University of St Andrews.
Kate is said to have caught William’s eye when she walked down the catwalk in a see-through dress at a charity fashion show in 2002.
Channel 5 royal correspondent Simon Vigar previously said: “When they were at university at St Andrews I have it on good authority that one of the few girls not chasing William or trying to catch his eye was Catherine.
“If that is true, she played an absolute blinder.
“He was definitely the target of lots of girls at university.
“But it wasn’t until the infamous fashion show that William noticed Catherine.”
The couple announced their engagement in November 2010.
Westminster Abbey was filled with 2,000 guests to see the future king marry Kate less than six months later on April 29 2011.
The bride wore a lace gown designed by Sarah Burton for Alexander McQueen, while the groom was dressed in the red tunic of the Irish Guards.
Nearly 25 million people in the UK watched the live televised ceremony, with the worldwide TV audience estimated to be two billion.
And one million people lined the procession route as the newlyweds took an open-topped carriage from Westminster Abbey to Buckingham Palace after the service.
William and Kate are now parents to Prince George, seven, Princess Charlotte, five, and two-year-old Prince Louis.
Source: EXPRESS CO UK