She was joined by a panel of judges to select 100 images from more than 31,000 entries in her Hold Still photography project, which was launched with the National Portrait Gallery in May.
Kate invited people of all ages across the UK to submit a photo which they had taken during lockdown, and in the six weeks that the project was open 31,598 images were submitted.
Speaking with the judges on a virtual chat, the Duchess of Cambridge said: “I’ve been so overwhelmed by the public’s response to Hold Still, the quality of the images has been extraordinary, and the poignancy and the stories behind the images have been equally as moving as well.”
Judges on the panel included England’s chief nursing officer Ruth May, director of the National Portrait Gallery Nicholas Cullinan, writer and poet Lemn Sissay and photographer Maryam Wahid.
Commenting on the photos, Ms May said: “I loved going through this, partly because it gives me a bit of a break from Covid-19 work that we’ve been doing in the NHS, where our NHS and our frontline staff have done an amazing job.”
She added: “I found it hard as well as hysterically funny at times. When I was going through them I had a good old giggle as well.”
Kate agreed with this, saying: “It’s true, it’s like a huge roller coaster, isn’t it, of emotions?
“I suppose that’s what everyone has experienced, a reflection of what everyone’s been through at this time.”
She said the images showed “how different and diverse everyone’s experience of Covid-19 has been”, adding: “No one story is the same, everyone’s is unique.
“It’s been great, it’s going to be so difficult to edit this down.”
The Hold Still initiative aimed to capture and document “the spirit, the mood, the hopes, the fears and the feelings of the nation” as the UK dealt with the coronavirus outbreak.
One of the final images chosen includes Robert Coyle’s photo entitled “We’re really lucky to have a garden”, in which he described: “Our son had taken to relieving himself on the plants, much to our initial amusement and then slight frustration.”
Addressing the panel, Ms Wahid highlighted the different religious festivities that were celebrated throughout lockdown which were reflected in the images.
“As a Muslim, there was Ramadan, there was a festival of fasting and then there was a celebration of Eid,” she said.
“For Sikhs there was Vaisakhi, so it was very interesting as there was quite a lot of religious festivities that was happening within lockdown.
“It was absolutely beautiful as well to see so many different volunteers just come together and just help in every single way.
“Whether it was for food or lifestyle, any kind of help being offered within the community was really beautiful.”
Mr Sissay described how “emotional” the judging process was, adding: “As I studied the portraits in this most public crisis I was drawn into the most private moments.”
The digital exhibition will launch on September 14, with a focus on three themes – helpers and heroes, your new normal and acts of kindness.
A selection of the photographs will also be shown in towns and cities across the UK later in the year.
Mr Cullinan said: “We hope that through this project we really will capture a portrait of our nation, reflecting our collective and individual experiences during these unprecedented times."