It is the royal couple's first trip to the US since 2014. PA
Prince William and Kate, Princess of Wales, arrive at Boston Logan International Airport in Boston. AFP
Hundreds of fans of the royals at City Hall Plaza awaiting the arrival of the Prince and Princess. AFP
It was a rainy night in Boston. AFP
Britain's Prince William, Prince of Wales, and wife Catherine, Princess of Wales, attend a Welcome to Earthshot event at City Hall Plaza in Boston. AFP
The Prince and Princess of Wales join governor-elect Maura Healy and the Mayor of Boston, Michelle Wu, at Speaker's Corner outside City Hall in Boston. PA
The Princess of Wales at Speaker's Corner for the start of the countdown to the Earthshot Prize Awards Ceremony. PA
The Prince and Princess of Wales are greeted by Ms Wu and her sons at Boston City Hall. AP
The royal couple at the Earthshot countdown event at City Hall Plaza in Boston. AFP
The weather did not stop the Prince and Princess strolling the city of Boston with Ms Healy and Ms Wu. Reuters
The royals chat with Ms Wu and her sons Blaise and Cass in her office. The Boston Herald / AP
William, the Prince of Wales, addresses an audience during ceremonies on Wednesday. AP
Crowds wave as the British royal couple walk to Boston City Hall Plaza. AP
The Princess of Wales was in very good spirits. PA
It is the royal couple's first trip to the US since 2014. PA
Prince William and Kate, Princess of Wales, arrive at Boston Logan International Airport in Boston. AFP
Hundreds of fans of the royals at City Hall Plaza awaiting the arrival of the Prince and Princess. AFP
It was a rainy night in Boston. AFP
Britain's Prince William, Prince of Wales, and wife Catherine, Princess of Wales, attend a Welcome to Earthshot event at City Hall Plaza in Boston. AFP
The Prince and Princess of Wales join governor-elect Maura Healy and the Mayor of Boston, Michelle Wu, at Speaker's Corner outside City Hall in Boston. PA
The Princess of Wales at Speaker's Corner for the start of the countdown to the Earthshot Prize Awards Ceremony. PA
The Prince and Princess of Wales are greeted by Ms Wu and her sons at Boston City Hall. AP
The royal couple at the Earthshot countdown event at City Hall Plaza in Boston. AFP
The weather did not stop the Prince and Princess strolling the city of Boston with Ms Healy and Ms Wu. Reuters
The royals chat with Ms Wu and her sons Blaise and Cass in her office. The Boston Herald / AP
William, the Prince of Wales, addresses an audience during ceremonies on Wednesday. AP
Crowds wave as the British royal couple walk to Boston City Hall Plaza. AP
The Princess of Wales was in very good spirits. PA
It is the royal couple's first trip to the US since 2014. PA