The Duke of Cambridge addressed allegations of racism from the Duke and Duchess of Sussex's interview with Oprah Winfrey as he and wife Kate made their first public appearance on Thursday.
William told a reporter: "We're very much not a racist family."
When asked if he had been in touch with his brother Harry, the Duke added: "No I haven’t spoken to him yet but I will do."
Buckingham Palace released a statement on Tuesday night in response to Harry and Meghan's interview, in which the Duchess had claimed that Prince Harry told her about a conversation with a family member where there were "concerns" over Archie's skin tone when he was born.
The statement on behalf of the Queen read: "The whole family is saddened to learn the full extent of how challenging the last few years have been for Harry and Meghan.
"The issues raised, particularly that of race, are concerning. While some recollections may vary, they are taken very seriously and will be addressed by the family privately.
"Harry, Meghan and Archie will always be much loved family members."
READ: 15 most surprising revelations from Prince Harry and Meghan's Oprah interview
WATCH: Prince William says royals are 'not racist' after Harry and Meghan interview
William and Kate's first outing was to School21 in Stratford, to highlight the rollout to secondary schools of a Mentally Healthy Schools, an initiative launched by the Duchess in 2018.
The Duchess looked elegant in a bubble gum pink coat from Max & Co, with a matching scalloped jumper from Boden and black Jigsaw trousers.
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In the first week of students being back in class since before Christmas, William and Kate heard how children at the state-funded school for pupils aged between four and 18 will have access to lessons on tackling anxiety and depression.
The classes are on a website funded by an initial £800,000 grant from the Royal Foundation of the Duke and Duchess of Cambridge and Prince Harry, which Kate unveiled on a visit to Roe Green Junior School in Kingsbury, north West London, three years ago.
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William and Kate talked to the children in the playground during their play session. Some were digging for a treasure in a sand pit.
"Have you found any treasure yet?" Kate asked the pupils.
She also asked the children what it was like to be back at school: "Is it fun to be back with all your friends?"
The Cambridges recently returned to London after spending lockdown at their Norfolk home, Anmer Hall. Their eldest children, Prince George and Princess Charlotte, are believed to have gone back to their classrooms at Thomas's Battersea in south west London earlier this week.
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Meanwhile, William helped one little girl to build a wall with some construction blocks.
He joked he had been taking orders from the construction manager.
"I was just doing what I was told," he said to laughter from teachers.
Andrea Silvain, deputy head of the middle school, said the last year of lockdowns had brought teachers and parents closer together and families had appreciated the help that the Mentally Healthy Schools website had given.
"We've had some very positive feedback from parents," she told the Duke and Duchess.
"People have been through this lockdown together," William said. "It's a really useful tool."
Charlie Dilger, head of inclusion at the school, said: "We want our young people to enjoy time with their mates.
"We want children who are open about their feelings."
Earlier in the day, William and Kate had been spotted driving to the engagement in their car.