The blouse is a style favoured by Diana, who died in a Paris car crash in 1997.
Diana wore a strikingly similar blouse, teamed with a red polka dot jacket, when she visited Tetbury with Prince Charles in 1981.
Kate’s fashion choice for the photo could be a nod to her mother-in-law.
The picture features alongside the introduction in Duchess’s book, titled Hold Still: A Portrait Of Our Nation In 2020.
Kate appeared to pay a subtle tribute to Princess Diana with her fashion choice
The pie-crust blouse is a style favoured by Diana
The Hold Still initiative was launched by Kate and the National Portrait Gallery (NPG) last year.
People from across the UK were invited to submit a portrait they had taken during the first lockdown.
The book features 100 pictures which were selected from more than 31,000 entries, and includes images of key workers and people isolated from family and friends, as well as moments of joy.
She said: “Through Hold Still, I wanted to use the power of photography to create a lasting record of what we were all experiencing – to capture individuals’ stories and document significant moments for families and communities as we lived through the pandemic.”
Kate added: “For me, the power of the images is in the poignant and personal stories that sit behind them.
“I was delighted to have the opportunity to speak to some of the photographers and sitters, to hear their stories first-hand – from moments of joy, love and community spirit, to deep sadness, pain, isolation and loss.
“A common theme of those conversations was how lockdown reminded us about the importance of human connection and the huge value we place on the relationships we have with the people around us.
“Although we were physically apart, these images remind us that, as families, communities and a nation we need each other more than we had ever realised.”
The book will be available from bookshops and online from May 7.
Proceeds from sales will help support mental health and arts projects around the UK, and will be split between mental health charity Mind and the NPG.
The 100 portraits have already been shown in a digital exhibition before being displayed across the UK in communities.
Kate is a keen amateur photographer and patron of the NPG.
The Duchess often releases snaps she has taken of her children to mark special occasions such as birthdays.
Kate and Prince William shared touching cards earlier this month that Prince George, Princess Charlotte and Prince Louis had made for their “Granny Diana” for Mother’s Day.
Source: EXPRESS CO UK