Kate reveals her special bond with the Queen in candid new documentary - and how she made her chutney for Christmas

Working out what to buy your in-laws for Christmas can be testing enough but it is surely near impossible when they happen to be the Queen. 

However, in a rare and exclusive interview the Duchess of Cambridge reveals that she was in that exact predicament during her first Christmas with her royal highness.

She says: 'I can remember being at Sandringham, for the first time, at Christmas. And I was worried what to give the Queen as her Christmas present. I was thinking, "Gosh, what should I give her?"'

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The Duchess of Cambridge reveals that she made the Queen homemade chutney for their first Christmas together at Sandringham 

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For the Queen's upcoming 90th birthday, members of the Royal Family have taken part in a documentary to give us all a small glimpse into the monarch's life.

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In her interview as part of a documentary celebrating the Queen's 90th birthday, Kate reveals that she turned to her own grandmother's recipe to handcraft her gift.

She continued: 'I thought, "I'll make her something." Which could have gone horribly wrong. But I decided to make my granny's recipe of chutney.

'I was slightly worried about it, but I noticed the next day that it was on the table. I think such a simple gesture went such a long way for me and I've noticed since she's done that on lots of occasions and I think it just shows her thoughtfulness, really, and her care in looking after everybody.' 

The touching anecdotes from the Duchess are part of Our Queen At Ninety, a historic two-hour ITV documentary which will be broadcast for the first time on Easter Sunday. 

The Duchess also reveals that Her Majesty was very supportive when helping her get used to public appearances. The pair pictured at a fashion show at De Montfort University, Leicester in March 8 2012

During her first solo interview the Duchess also reveals that her son George refers to the Queen as Gan-Gan. Pictured at sister Charlotte's christening in July last year

Like the record-breaking monarch it celebrates, it’s a programme with a record of its own since it includes contributions from more members of the Royal Family than any royal documentary ever made. 

In her first solo interview, the Duchess explains how the Queen has gone out of her way to help her adjust to life in the spotlight since she married Prince William in 2011. 

‘She’s been very generous,’ she says. ‘I feel she’s been a gentle guidance really for me.’

You can read more about the programme in this week's Easter special of the Radio Times

One day still sticks out in the Duchess’s mind – 8 March, 2012. It was Day One of the Queen’s Diamond Jubilee tour of the United Kingdom. 

The Duchess was minus her husband – who was on duty with the RAF in the Falkland Islands – as she joined the Queen and Prince Philip in the East Midlands.

‘The most memorable engagement for me, I suppose, was an away-day to Leicester. I went without William so I was rather apprehensive about that,’ says the Duchess, in conversation with the director of the programme at Kensington Palace. 

While describing herself as a ‘very small element’ in such an important day, the Duchess says that the Queen was ‘very supportive’.

‘The fact she took the time to make sure that I was happy – and looked after me – shows just how caring she is.’

She also explains how excited the Queen was by the arrival of Princess Charlotte last May. 

‘It’s very special having a new little girl. I feel very, very lucky that George has got a little sister. 

'The Queen was really thrilled that it was a little girl and I think as soon as we came back here, to Kensington, she was one of our first visitors.’

The Duchess reveals that two-year-old Prince George has a special name for his great-grandmother. ‘He calls her Gan-Gan,’ she says, adding that ‘Gan-Gan’ is particularly attentive whenever the younger Cambridges are staying with her. ‘She always leaves a little gift or something in their room when we stay. And that just shows, I think, her love for her family.’

To read more about the programme see this week's Radio Times, on sale now.  

Our Queen At Ninety airs on Easter Sunday, 27 March, at 8pm on ITV.