The documentary ‘Kate: In Her Own Words’ delved into Prince William and Princess Kate’s 2010 engagement interview, with two body language experts providing their insights.

During the interview, which was conducted by Tom Bradby, he commented on Kate’s “close-knit family”, leading Kate to discuss the importance of family and her hopes for a “happy family” with William.

However, body language specialist Judi James noted signs of “tension” in Kate’s demeanor when her family was mentioned, suggesting that the topic made Kate “nervous”.

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James observed: “We can see there are signs of tension from Kate. Kate’s family is mentioned and this seems to make her more nervous than actually speaking about the royals.”

Bradby then asked William and Kate about their parents’ reactions to the engagement news. William admitted his initial uncertainty about whether to ask Kate’s father for permission first.

He expressed his fear of being turned down, so he decided to propose to Kate first, ensuring her father couldn’t “really say no”. At this point, James pointed out that Kate seemed to be “feeling a little bit awkward”.

She said: “We can see her swallow. She sucks her lips in and that usually is a sign of a lack of desire to talk at that particular point, maybe feeling a little bit awkward, maybe even a little bit anxious.”