KATE wowed in a tartan Burberry dress last night during her visit to Boston with William, as the pair kicked off a three-day whistle-stop tour of the US.
The couple flew into the city on a commercial flight from London, landing in the pouring rain on Wednesday afternoon.
They received massive cheers from crowds outside City Hall who had braved the weather to greet them.
Princess Kate, 40, was stunning in a Burberry dress, a coat by Alexander McQueen, and earrings by the sustainable brand Shyla London.
Addressing the waiting Bostonians, Prince William, 40, said: "Thank you to the hardy Bostonians for braving the rain.
"Catherine and I are absolutely delighted to be with you today, for our first engagement in the great city of Boston, as we start the count down to The Earthshot Prize Awards this Friday."
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The tour, their first of the country since 2014, will culminate in Wills presenting the £50million Earthshot prize for contributions to environmentalism.
He added: "We cannot wait to celebrate The Earthshot Prize Finalists later on this week, and we are both looking forward to spending the next few days learning about the innovative ways the people of Massachusetts are tackling climate change."
The royals were welcomed to the city by Boston Mayor Michelle Wu, the first Asian American to hold the role.
Later, Ms Wu accompanied them to a basketball game between the Boston Celtics and the Miami Heat.
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The princess wore a smart blue blazer, with dark trousers and matching shoes.
It is the first time the couple have been pictured since Buckingham Palace was engulfed by a race row.
Both the Palace and William last night condemned the "unacceptable" conduct of a top Royal aide who triggered the race storm.
Lady Susan Hussey, who is William’s Godmother and was a loyal and trusted servant to the late Queen, asked a black British-born guest at a reception: "Where are you really from?"
The 83-year-old has stepped down from an honorary role after making the comments to domestic violence worker Ngozi Fulani during a Palace bash on Tuesday.
Ngozi, 61, said Lady Susan approached her, moved her hair to see her name badge and asked: "Where do your people come from?"
When the charity worker explained she was born in Britain and lives in Hackney, East London, the royal staffer asked: "What part of Africa are you from?"
Ngozi said the experience, which reportedly occurred just ten minutes after she arrived, left her "insulted" and with mixed feelings.
Her pal Mandu Reid, 41, leader of the Women's Equality Party, who witnessed the shock chat said they felt like "trespassers" and like they had undergone an "interrogation".
The Palace launched an investigation and, within two hours Lady Susan, who served as Lady-in-Waiting to the Queen for 62 years, admitted the comments and apologised.
She then quit her honorary role with Queen Consort Camilla as Lady of the Household which she only took up on Sunday.
Prince William was not involved in the decision for Lady Susan to step down.
However, it is understood that he "believes it was the right course of action".
Speaking in Boston, a spokesman for the prince said: "Racism has no place in our society. The comments were unacceptable."
Meanwhile, a Palace spokesman said that the incident was taken "extremely seriously" and that "unacceptable and deeply regrettable" comments had been made.
He added: "We have reached out to Ngozi Fulani on this matter and are inviting her to discuss all elements of her experience in person if she wishes.
Ngozi was at the Palace on behalf of domestic abuse charity Sistah Space.
She was among 300 invited guests who heard Camilla speak out against domestic violence.
The campaigner told : "This is bigger than one individual.
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"It’s institutional racism."
However, she stressed that she does not wish to see Lady Susan "vilified".