Prince William is "the best teacher" for Duchess Catherine.
Prince William and Duchess Catherine
The Duchess of Cambridge has been praised for how she has settled in to royal life following her marriage to Prince William five years ago and Ingrid Seward, editor-in-chief of Majesty magazine says William has been instrumental in guiding Catherine.
She said: "I think she's integrated extremely well. It's not easy - not a lot of guidance - but of course she has the best teacher in William.
"I think that's made a massive difference - having his hand on her hand.
"She hasn't made any mistakes, which is extraordinary when you think of how difficult it is for her.
"I suppose the only mistake she's made is that she's probably seen not always as particularly interesting but I think she's absolutely terrified of not doing it right.
"I think she feels a great responsibility on her slender shoulders to do the right thing and be seen to be doing the right thing."
And Ingrid believes the couple - who have children Prince George and Princess Charlotte together - rely heavily on each other.
She told the Daily Express: "I think she's probably his best friend and vice versa. You get pretty isolated up there in that ivory tower of royalty."
Tagged in Prince William Duchess Catherine