But she's now spoken about her life away from the public glare, revealing how she has loved teaching music to primary school children in a school in Hull for the last eight years.
The majority of her students didn't have a clue who she was!
Known to her pupils as 'Mrs Kent', the Duchess told The Alan Titchmarsh show she loved the violin and organ, and narrowly missed out on a place at the Royal Academy of Music, pursuing her passion for music through teaching after retiring from public life.
'When I was teaching the first thing I began to notice was the power of music as a stimulant to these children to give them confidence and self-belief. I began to see that happen all the time,' said the Duchess.
'Some of the children I taught haven't necessarily become musicians, but the confidence it has given them, some have joined the Army, some to university, which they might not have done otherwise.
'I have always loved talent, I love that tickle up the neck when you see talent and I began to realise I was teaching some very, very gifted children.'
She also spoke of her sadness that music wasn't as popular a subject as others at school:
'Oh my goodness is it under rated. I would love to see one of the arts being compulsory at GCSE level. I think that would be wonderful.
'Someone asked me the other day, why wasn't music as popular as football and I couldn't answer at the time because I was nervous but then I realised that music is so much more popular than football. There isn't a person in the world who doesn't tap their feet to music.'
The Duchess has now left teaching and has launched a music charity called Future Talent.
What a lovely story!
Wouldn't it be amazing to have a member of the royal family teaching in your local school?
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