The Prince and Princess of Wale are back in America.

Marking their first trip to the United States since 2014, and their first overseas trip since the death of Queen Elizabeth II, Prince William and Princess Catherine arrived in Boston on Wednesday, November 30. The couple spent three days in the city, where they hosted their second annual Earthshot Prize Awards, a ceremony that honors five innovators for their achievements in environmentalism.

Shortly after touching down in Boston, William released a statement expressing his enthusiasm about the coming trip and remembering his late royal grandmother, who died at 96 years old this past September.

"Catherine and I are delighted to be back in the United States and are extremely grateful to Governor Baker and The First Lady of Massachusetts for their warm welcome into Boston," he said. "On this, our first overseas visit since the death of my grandmother, I would like to thank the people of Massachusetts and particularly of Boston for their many tributes paid to the late Queen. She remembered her 1976 bicentennial visit with great fondness. My grandmother was one of life's optimists. And so am I. That is why last year we launched the Earthshot Prize with the ambition to create a truly global platform to inspire hope and urgent optimism as we look to save the future of our planet."

He concluded, "To the people of Boston, thank you. I’m so grateful to you for allowing us to host the second year of the Earthshot prize in your great city. Catherine and I can’t wait to meet many of you in the days ahead."

Ahead, see every photo from the Wales's trip.

Kate walks onto the stage during rehearsals for the Earthshot Awards at MGM Music Hall at Fenway.

William smiles during rehearsals.

A sign from rehearsals.

The couple meets with the community of east Boston.

The couple tours east Boston.

The Waleses with with Mayor Michelle Wu and Reverend Mariama White-Hammond.

The Waleses visit east Boston to hear about how the community is contending with climate change challenges to the city's waterfront.

The Waleses visit east Boston to hear about how the community is contending with climate change challenges to the city's waterfront.

The Waleses visit east Boston to hear about how the community is contending with climate change challenges to the city's waterfront.

The couple accepts gifts during a visit to Roca, a non-profit organization focusing on high-risk young people at the center of urban violence.

William and Kate tour Greentown Labs.

The couple speaks with representatives at Greentown Labs.

William and Kate tour Greentown Labs.

Kate and William accept flowers from a little boy dressed up as the King's Guard.

Princess Kate arrives at Greentown Labs in a wine-colored suit.

The royals watch the NBA basketball game between the Boston Celtics and the Miami Heat at TD Garden.

The royals laugh together while sitting courtside.

The royals cheer during the game.

Kate and Emilia Fazzalari, wife of Celtics owner Wyc Grousbeck, watch the NBA basketball game between the Boston Celtics and the Miami Heat at TD Garden.

Kate and Fazzalari laugh during the match.

The royals watch the NBA basketball game between the Boston Celtics and the Miami Heat at TD Garden.

William and Kate speak with a fan during the Boston Celtics and Miami Heat game at TD Garden.

William and Kate visit Boston City Hall to start the countdown to the Earthshot Prize Awards.

William and Kate visit Boston City Hall to start the countdown to the Earthshot Prize Awards.

William and Kate visit Boston City Hall to start the countdown to the Earthshot Prize Awards.

Kate wears an emerald coat over a green-and-blue plaid midi dress by Burberry.

The Waleses meet with Mayor Michelle Wu at City Hall.

The Waleses meet with Mayor Michelle Wu at City Hall.

Royal watchers await the arrival of William and Kate.

Royal watchers await the arrival of William and Kate.

William and Kate are greeted by First Lady Lauren Baker and Governor Charlie Baker as they arrive at Boston Logan International Airport.

Prince William and Catherine, Princess of Wales, arrive at Boston Logan International Airport.