A Channel 5 documentary has analysed Princess Kate and Prince William's 2010 engagement interview with ITV, with a body language expert suggesting that Kate was feeling 'nervous'

During a major royal event when the eyes of the world were upon her, Kate managed to put on a brave face and a big smile despite dealing with secret heartache - an expert has claimed

As a member of the British royal family, the Princess of Wales has travelled the world on overseas tours, but a royal expert has claimed one aspect of these trips is particularly hard for Kate

Kate Middleton, when performing her official royal duties, is often seen as the epitome of perfection - especially with her kids. Her radiant smile and engaging conversations during her engagements give the impression that she's absolutely delighted to represent the crown.

Whenever Kate undertakes official royal engagements she is almost always all smiles, but a royal expert has claimed that there is hidden heartbreak underneath the Princess' polished appearance

The Duchess of Cambridge is known for her warm, engaging smile and always looking picture-perfect, but a royal expert has claimed she still finds one aspect of her duties very hard