Kate Middleton and Prince William opened up about their relationship in a rare joint interview following their engagement in 2010, and body language experts have analysed the chat

The Duchess of Cambridge has a unique way of keeping her three children in line - a simple four-word phrase that carries a lot of weight, according to a Royal expert

In an interview with ITV, Princess Kate reportedly showed signs of "tension" and appeared to be "nervous" when the subject of her family came up, according to a body language expert

Kate Middleton, the Duchess of Cambridge, has always been close to her family, but a body language expert has claimed that she showed signs of "tension" when they were mentioned in an interview