Prince William, Prince of Wales and Catherine, Princess of Wales, watch the NBA basketball game between the Boston Celtics and the Miami Heat at TD Garden on November 30, 2022 in Boston.

Prince William, Prince of Wales and Catherine, Princess of Wales, watch the NBA basketball game between the Boston Celtics and the Miami Heat at TD Garden on November 30, 2022 in Boston.Getty

His Majesty Prince William and Princess Kate are currently in Boston for a landmark US tour.

Earlier yesterday evening, The Prince and Princess of Wales attended the launch of the Earthshot Prize, which is awarded to winners each year for their contributions to environmentalism. 

In a speech at the launch, Prince William thanked Boston and President John F. Kennedy, particularly his famous 'Moonshot' speech, for inspiring the creation of the Earthshot Prize for fighting climate change.

"Sixty years ago President John F Kennedy's Moonshot speech lay down a challenge to American innovation and ingenuity. 'We choose to go to the moon' he said, 'not because it is easy but because it is hard.' It was that Moonshot speech that inspired me to launch the Earthshot Prize with the aim of doing the same for climate change as President Kennedy did for the space race. And where better to hold this year's award ceremony than in President Kennedy's hometown in partnership with his daughter and the foundation that continues his legacy," said His Majesty during his speech.

Later that evening Prince William and Kate attended an NBA game between the Boston Celtics and Miami Heat at the TD Garden stadium.

Before the game, the royals met members of the 'Celtics family', including representatives of the Boston Celtics Shamrock Foundation, which provides grassroots programming and funding to local organizations serving at-risk or at-need populations.

The couple arrived in the US amid controversy at Buckingham Palace this week. On Wednesday, one of King Charles’ top team members resigned after domestic abuse activist Ngozi Fulani claimed that she was asked racially loaded questions about her heritage and background by the palace aide.

In a statement, a spokesperson for Buckingham Palace said: “We take this incident extremely seriously and have investigated immediately to establish the full details.”

“In this instance, unacceptable and deeply regrettable comments have been made. 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.”

“In the meantime, the individual concerned would like to express her profound apologies for the hurt caused and has stepped aside from her honorary role with immediate effect.”

“All members of the Household are being reminded of the diversity and inclusivity policies which they are required to uphold at all times,” the statement added.